z-score Calculations & Percentiles in a Normal Distribution

[@manisharathore6605]

Thanks a lot. None of teachers on you tube made me understand this but you do sir.🙂

[@profrobbob]

You are very welcome Manisha...and thanks for not giving up until you found the help you needed:) Sounds like the perfect time to share this resource channel with your teacher so ALL students can study at home like you did...BAM!!!

[@manisharathore6605]

@@profrobbob Yes sir , today was my test . I got full marks . Thanks a ton sir.😃

[@profrobbob]

CONGRATULATIONS@@manisharathore6605 ! You're welcome and thanks for choosing this channel to study with...please share our channel and your success story with your teacher so all current and future students can do the same...BAM!!!

[@JohnSmith-ur1pf]

Last minute studying

[@profrobbob]

@@JohnSmith-ur1pf Congrats...hope you passed that test like BAM!!!

[@tracymorrison2355]

I am a married mom of 2 back at college (after a 20 year absence) earning a degree in Nutrition Science/RD. I am required to take Stats this semester and was lost the first day. I kept scrolling through Pinterest under stats help and someone pinned this video. The past week and a half I have struggled with z-scores and the proportions-my university professor and textbook was not much help. This video helped me so much! Thank you so much. I subscribed and liked.

[@profrobbob]

Hey Tracy Mrs. Tarrou here...First off, thanks for sharing your story, choosing this channel, liking and subbing right away...if we could only get them all trained to do that we would have a million subscribers by now:) I help Rob with the general comments and wanted to reply to yours myself...we have noticed a lot of pins from teachers on Pinterest lately, but never realized until now, that anyone actually looked for "help" there...so "thank you"! Yet another place to target. It's hard work to groW an educational channel on KZbin and get viewers to realize how important it is for channel growth to like, subscribe and support the ads. I also work at getting the word out thru social media and looking for new ways to get his subscriber count up...my personal goal is 100,000 by the end of the year! (dream BIG right?!:) Congrats for taking the leap back to school and best of luck with your latest journey in life. I hope you continue to find the help you need from Rob's videos...he puts a lot of heart and love into them:) I'm blessed to live it everyday...Cheryl

[@ferankferd]

I was really stressed about my stats exam coming up. Your enthusiasm and unfathomable ability to express material has not only helped me feel more comfortable about my exam, but has eased my stress. If only the world was filled with profs like you, students wouldn't struggle so hard with subjects like math. KEEP DOING WHAT YOU'RE DOING!

[@jameshitchcock2626]

It's 6:05 AM and my assignment is due at 11, I haven't slept in a long while. I owe you my life ProfRobBob.

[@profrobbob]

I hope your'e all caught up on your sleep by now and got that assignment done in time! Don't forget to like, sub and share this free study resource with everyone, especially your teacher, so all current and future students know where to find us...BAM!!!

[@saararafaq7675]

You are the best. This was so much helpful . Almost after 10 years , its still the best .

[@profrobbob]

Thanks for tuning! Good thing math never goes out of style:) Please subscribe and keep sharing this channel with everyone, especially your teacher...BAM!!!

[@sardiniegenie]

I had such a hard time trying to figure this out, thank you for this video. It is so much easier to understand than reading it from the textbook. And thank you for bringing out the z-chart, it's been a time saver now that I understand it better.

[@sailormyers99]

Can we please appreciate how much this helps

[@profrobbob]

That would be greatly appreciated! You can help us by liking, subbing, sharing thru social medias, with classmates and especially your teachers...BAM!!!

[@TonyTheTrain]

I appreciate people like you very much. You taught in 15 minutes as much as an hour and a half lecture. BAM! You rock!

[@profrobbob]

As I appreciate student like you taking advantage of the free help that is offered to those who seek it out! Please take the opportunity to share my channel with your classmates and your friends and remind them to SUBSCRIBE and like and spread the word as well...then we all win!

[@2averagejoes]

3 years later and this was extremely helpful. Cleared up every question I could have had.

[@profrobbob]

Glad I could help! Thanks for watching and liking:)

[@caydancehurst2686]

The amount of videos I’ve had to go through to have this simple concept explained is baffling, you did an amazing job teaching this, you are very helpful thank you :,)

[@profrobbob]

Thanks for taking the time to "thank the teacher"! Sounds like the perfect time to like, subscribe and share this channel with your teacher so all current and future students know where to find free math help...BAM!!!

[@ITzFallacyy]

LOVE THE ENTHUSIASM!!! KEEP UP THE GREAT WORK!

[@profrobbob]

THANKS for choosing #ProfRobBob to watch and learn from Jack Chien ! Please like, subscribe and spread the word to help us groW and help others:D

[@profrobbob]

That is AWESOME! I am glad I could help. I am using the Standard Normal Distribution Table or the z-score chart. You will not find the exact value of .75 in the body of the table...just get as close as you can.

[@lucasxto]

Prof.Rob u r awesome haha ..u explained everything very clear..I think its a gift to teach ;). I'm here in Africa- Mozambique and watching your videos ( I'm doing my IGCSE AS Level maths next week )

[@iammestaman]

These videos are very helpful. I'm taking four classes at my high school, the fourth hour of my day being AP stats. I have to leave 20 minutes into the stats class to head off to a local community college where I'm taking calc 2, so I'm pretty much replacing the in-class lessons with these videos. I don't think I could make it through the year without these videos, so Thanks!

[@Engineerboy100]

Well done Mr. "Bam" man, lol good job, I'm a tutor also but I watch a lot of other peoples math presentations to add to how I present in person. Thanks for a great job.

[@profrobbob]

You're welcome...and THANKS for watching, studying my style and supporting this channel! Keep up the extra efforts in perfecting your tutoring technique...there will always be people who need math help...BAM!!!

[@goodnesskabelo]

I love your honesty... I am a tutor and a student too

[@nabarajbaral2063]

@@profrobbob what must be added to the polynomial x^3-4x^2+x+2 to make it x^2-x+4?

[@hwuccs4388]

Dude. You are awesome. I almost failed my class and than I watched this here... I think those that unliked the vid are teachers that could not explayn this....

[@profrobbob]

Thanks for watching and the positive reinforcement...Can't believe there are that many thumbs down:( I'm going to just go with your reasoning for now...lol Please sub and share this channel with everyone you know who will share and not give me a thumbs down:)

[@jasminewilder5329]

This really helped me, i missed 3 class days due to wisdom teeth extractions and this video alone really turned around my lost brain. Thanks so much, about to look through your other videos :]

[@profrobbob]

Thanks for seeking outside help and choosing my channel to study with! Hope your'e feeling better too:)

[@lisacrombie4817]

I have to send you out a big thank-you!!! I'm doing my statistics course distance learning which makes it really hard. I've read the book over and over and still was having trouble making send of it. I've struggled insanely...I'm a visual learner. I started watching your videos last week and I can find say I'm getting it. I have an mid-term exam on Monday and I'm not nearly as panicked as I was... A huge great big THANK-YOU!

[@Hyde1415]

This was great! There needs to be more teachers like you!

[@profrobbob]

+Hyde1415 thanks for watching, liking, learning and subbing to my channel!..and for taking the time to share a compliment as well, please keep spreading the word:D

[@jdconrad7848]

I have taken away more from this video than the four hour lecture my professor gave last week. Thank you for this!

[@profrobbob]

You're welcome…and THANK YOU Joe for supporting by watching, liking & subscribing…I really appreciate all the support and I'm happy to hear that you found my video so helpful…sounds like you could be a hero and should share my channel with your class as well:)

[@jdconrad7848]

I plan on it!

[@profrobbob]

Joe Conns Thanks…that's AWESOME!

[@profrobbob]

I added Closed Captions to my top 4 math videos to date. WOW, I am not the best typist so this took forever. Here is #1 kzbin.info/www/bejne/lWmZomCeo8RmerM

[@emiajyduj]

Way to go prof!:)

[@profrobbob]

Thanks Judy Jaime ...no real feedback yet but I have had a few viewers request it. The process is very time consuming though, since I'm NOT a very fast typest:(

[@sudisalumu4435]

ProfRobBob easy to understand thank you

[@quenn3368]

ProfRobBob THANK YOU VERY MUCH😍😍😍😍

[@fahisaed]

ProfRobBob how about if X>200 & if X < 200

[@RainTailz]

You did what my professor couldn't. For that I thank and look forward to your future videos and your random spurts of enthusiasm.

[@profrobbob]

BAM!!!...thanks for choosing Tarrou's Chalk Talk to watch and learn from! I'll try my best not to disappoint with the enthusiasm:)

[@daciajames2961]

That jump in was everything!

[@profrobbob]

BAM!!! There are plenty more where that came from, just sub and keep watching!...and don't forget to spread the word about this free study resource thru out your social media so everyone will know where to find us:D...THANKS

[@ganeshShelkeSGS]

How on earth I didn't find this video so quickly. I was looking for this for a long time. Thanks a lot Prof. Robert Tarrou. Surely gonna watch all the videos over the time to learn new concept and to brush up the concepts I've already learnt.

[@profrobbob]

You're welcome. Now that you found us don't forget to like, sub and share this channel with EVERYONE...BAM!!!

[@DarkInnocence3]

this is the EXACT video i was looking for thank goodness thank you so much!

[@profrobbob]

You're welcome so much Justin Zen thanks for liking but please don't forget to SUBSCRIBE and share to help my channel groW!

[@profrobbob]

You're welcome, I'm glad my video was a good assistant! And thank you for watching, sharing, liking and subscribing:D

[@Aaronstotle]

Great video! Straight to the point and very simple to understand, going to tell my Stats class about this channel:)

[@profrobbob]

+Aaron W THANKS! We really appreciate the support and ask that you remind all those classmates how important it is to like, subscribe, support the ads, share thru social medias and with their friends in order to help these free educational channels grow and remain free for everyone:D

[@katyaguilar5228]

+ProfRobBob I have a question ... why is .67 and not 6.8? still confusing

[@Aaronstotle]

+ProfRobBob I noticed your comment about adding closed captions, if you'd need any help let me know, I'd be happy to contribute to a channel like this:)

[@profrobbob]

+Aaron W That would be GREATLY appreciated. I basically watch my videos at 1/4 speed and type a transcript document and then paste it into KZbin's Closed Caption editor and let it auto sync, double check the timing, and then publish them. If you will be willing to type up a transcript (or as many as you like) and email it to me so I can load them in I would be very grateful. I sent you a private message with my email.

[@zachcglontz]

The best statistics youtube teacher I can find! He just made me get a 100 on my test!!!! Thanks ProfRobBob. Explains everything so a student can understand what to do. Truly amazing.

[@profrobbob]

+Zachary Glontz BAM!!! Thanks for liking, subbing, studying and the great testimonial Zachary :)

[@leonardjonas6283]

Great Prof. I salute this man. Now I can sleep with ease and at peace. Thump up!!!!!!!!!!!!

[@profrobbob]

Thanks for studying and subbing! Please share this channel with teachers and classmates too:D

[@profrobbob]

Good to hear that you are searching for extra help in order to be more prepared for that AP test! Not waiting till the last minute gives you more time to soak it all in a little at a time. Now that you found my channel I hope you will return for help often...and please share with your classmates...maybe you could even form a study group and you could all prepare together:)...just a thought, I have alot of viewers tell me how great it has worked for them!

[@faithisabel25]

Another great video! BAM!!! Thank you Prof Rob :-)

[@profrobbob]

I wish all my students studied like you do:)

[@quenn3368]

ProfRobBob omg this sounds sad. But trust me if you're a prof in the Philippines we would love MATH!!!😍

[@mysterysailboat]

These videos have seriously made all the difference in my learning AP statistics. You are great.

[@jisforjenny01]

This video is going to help me pass stats. Thank you so much!

[@profrobbob]

Jenny T. BAM!!!You're welcome and thanks for choosing #ProfRobBob to learn from! Please like, subscribe and spread the word to all your friends:D

[@davesax11]

Prof RB you are truly gifted. Most go thru the mechanics and it doesn't come alive. Finally the light is clicking on (I hope). Many many thanx

[@profrobbob]

Sounds like a BAM!!! moment to me:) Thanks for liking, learning and subbing and the nice compliment...please tell all your friends, classmates and teachers about this free resource too:D

[@Benjain0125]

Love the enthusiasm!!!

[@profrobbob]

Thanks for watching, learning, subbing and being inspired to learn Benjamin Salazar BAM!!!

[@aldrin812]

Thank you Mr Tarrou!! My savior since 2013

[@profrobbob]

You're welcome Jonas and THANK YOU for the years of support! You must have told a million students about us by now too, if not, it's time to start spreading the word because we should have a million subscribers by now...BAM!!!

[@itsDianaChen]

Literally just explained everything so helpfully for my Stats 250 course at the University of Michigan Thank you!!!

[@profrobbob]

You're welcome ***** thanks for taking the time to study with #ProfRobBob ! Please be sure to share my channel with the other 42,000 students, friends, classmates and teachers at Michigan State...tell them how helpful you found my channel while reminding them to like, subscribe, support the ads, share thru social media, post in the student tutor center, on the math help webpage and anywhere else you can think of to make Tarrou's Chalk Talk one of the go-to channels for FREE math help at Michigan State...BAM!!! ...and don't forget who helped you with your math homework when you are a rich and famous singer:)

[@madridquesada6817]

Thank you so much. You explained to me in 13 minutes what my teacher couldn't in 5 weeks. I have subscribed to your channel and will continue to watch and share with my fellow classmates.

[@LuisKing150]

THANK YOU VERY MUCH!! SO BEAUTIFUL HOW IT NOW MAKES SENSE :'))

[@profrobbob]

You're welcome Luis Mendez Sounds like you had a "BAM!!!" moment?!

[@TheRealNasakumi]

Thank you so much for making these videos. Without these I would not understand anything in my statistics class.

[@profrobbob]

You're welcome Nasakumi Pawz and thanks for watching, learning, liking and subbing too! Please share my channel and your experience with the rest of your stats class and your teacher as an "additional study resource" and help my FREE educational channel groW and help others like you:D

[@joshturner4359]

Laughed so hard at 5:50 when he said BAM

[@profrobbob]

+Josh Turner Don't forget to sub and share the BAM!!!

[@jenniferweir7982]

+ProfRobBob Need the bumper sticker, "Share the BAM!"

[@profrobbob]

+jennifer weir LOL...what a GREAT idea!!! No, really...would you have a place for one if we looked into getting some made? I love the idea, we could add the channel info on the bottom so students could find us. Would you put it on your car, a notebook, would you pay money for one? I'd love some feedback if you have time and of course you will be promised the first one available:)

[@jenniferweir7982]

I'd stick them everywhere, my laptop, notebooks, give them to classmates! It would be hard to get students to pay for them, I think you'd have to write it off as advertising. Maybe students could earn them by posting pictures of themselves holding before BAM and after BAM grades.

[@profrobbob]

+jennifer weir THANKS for the feedback...I did check into the cost and they aren't very cheap to make unless you order 500...but if we find some that are more affordable we will certainly send you the fist edition if you want to shoot us your address in a personal message! We've had a lot of students suggest that we open a Patreon account and that could be something to offer for a commitment...thanks again for your time and idea:)

[@sarawofford]

You're the best. I have to take an IB Math test in less than two weeks and it includes statistics, even though I've never taken a statistics class before. I have a feeling you just may save my life.

[@nataschaatwood5436]

I love your enthusiasm! Now if I can ask you to make a video covering "real limits" and interpolation I'd be great! Thanks for uploading! Bam!!

[@profrobbob]

Thanks for watching! I wish I had time to do requests, but with teaching full time and a keeping up with videos which follow my class teachings there just aren't enough hours in the day:( Don't forget to SUBSCRIBE, like, support the ads and share to help educational channels like mine groW and help others! BAM!!!

[@AaronTenebrae77]

Wow, AWESOME explanation! Not only was I able to finish my homework, but now I understand it too- BAAMM!! Thanks for the help, I'll spread the word!

[@rachaelzee659]

BAMM!!! Thank you so much... :)

[@garcia_miguel]

Incredible how one simple video can teach me better than a whole semester of classes. Thank You for helping pass the final :)

[@profrobbob]

You're welcome but I'm sure the foundation was there from all your studying as you were learning Miguel Garcia Thanks for being such a great student and taking the time to study...hope you passed that final like BAM!!! then after you do, please return to like, SUBSCRIBE then tell all your friends, class and teachers where to find me and to do the same:D

[@starbaby90]

The ending was hilarious lol love it.

[@profrobbob]

There is plenty more where that came from Valery Foote now that you have liked and subbed! Please spread the word:D

[@starbaby90]

I certainly will!!

[@profrobbob]

Valery Foote BAM!!! Thanks :)

[@polarotter]

Thank you for giving such clear and detailed explanations. I've been having trouble trying to learn the normal distribution and this is the first time I've actually understood it.

[@kagome1995327]

On my Z score chart for .09 and over to .03 gave me .3238

[@dougwoolery998]

Same I have been going crazy

[@patriciahorack3061]

I struggled with this for my homework that is due in 4 hours and my "professor" couldn't even help when I asked for it. I just learned more in 13 minutes than I have in three days! You are AWESOME!

[@profrobbob]

BAM!!! Thanks for the compliment and for watching, learning and subbing Patricia Horack I hope you will share your learning experience and tell all the students in your class about my channel ~ please remind them to like, subscribe and support these free educational channels to help keep them FREE :D

[@MrCodmaster777]

LMAO love the ending

[@profrobbob]

BAM!!!

[@LuckytheAsian]

The most helpful video on calculating z-scores within a normal distribution and also the most entertaining. I wish you were my stats professor you have such a charismatic way of teaching that makes me want to learn! Thank you professor for helping me understand this material.

[@profrobbob]

+LuckytheAsian you are so welcome and THANK YOU for taking the time to thank the teacher and for studying and finding outside help from my channel! Please take the time to like, subscribe and share these free educational channels with others to help us grow and remain free for everyone...BAM!!!

[@LittleMew133]

You are a God. Can you please become my professor? Or become my professor's professor.

[@profrobbob]

LOL... Blah Smith Now that you have liked and subbed I can at least be your KZbin teacher 24/7 and as for your professor, you could share my channel with them as an additional study tool for after school hours...BAM!!! And please remind them all (your friends and your classmates that you've shared my channel with:) to like, SUBSCRIBE, support, share thru social media, etc to keep this FREE educational channel growing and to remain FREE!!!

[@victoriasesay-posey5045]

omg... i read this chapter in my book twice, did homework, and now i'm studying for my quiz... I FINALLY GOT IT!!! thanks to this video!!! Thank you so much!

[@isar3884]

Thank you professor Rob, you have save my life so many times. You are the only person I truly understand.

[@profrobbob]

isa r thanks for choosing #ProfRobBob to learn from:)

[@luisprado8483]

I admire your teaching professor. Hope you get a raise!

[@profrobbob]

Awesome! Thank you for watching. I hope you do great next year:)

[@jays907]

Thank you for keeping the board, and your explanations neat. I especially loved how you connected other ideas which are fundamental to the normal curve (standard deviations) and used it throughout, it made me feel more comfortable to see how the language can be used.

[@profrobbob]

Thanks for your support and appreciation too!

[@profrobbob]

You are so welcome....My style is to teach you how you get the answers and not just the formulas...glad it was helpful to you:) Thank you for subscribing too...and please spread the word:D

[@harris971]

Thank you so much! I take online classes and my professor is basically MIA. You helped me figure out a problem that I have been stuck on for days!

[@highdabei]

I'm not joking, you've managed to explain this in 13 minutes and I understood everything perfectly.. thanks a lot! I wish my prof was a bit more like you, it would make things much easier! Subscribed!

[@profrobbob]

BAM!!! Thanks for watching, liking and subbing highdabei if every student was like you I'd have a million subscribers by now! Glad to hear this video was so helpful and I hope this means you will be sharing my channel with everyone in your class, and even your Professor as an additional free study resource. Then tell your all your friends, post it in the student tutor center, on Facebook, Twitter, Instagram...help us groW and get at least 100,000 subscribers by the end of the year:D

[@ffandoh]

Wow! You are born a teacher!!! Please apply to my university. Most professors are struggling to explain a concept like this. Thanks for making it so easy! We appreciate your patience and tactical approach to teaching.

[@profrobbob]

+Felix F THANKS! You're welcome and I appreciate you taking the time to find outside help and choosing my channel to learn from:) Please take the time to like, subscribe, support the ads, share thru social medias and with your friends, class and teachers to help mine and other educational channels grow and remain free for everyone:D

[@profrobbob]

CONGRATULATIONS Gaea...I call it "teamwork", you took the time to search out extra help and I was there to share my lessons with you:) Keep up those awesome study habits and the possibilities are endless! Thanks for taking the time to share your great grade with me.

[@pieceofcake79]

:) It really is refreshing to see someone teach with such passion and dedication. Thank you for all you do, it really makes a difference!

[@BobbyPW]

I am taking a stat class for a graduate education degree and as a history teacher, math has never been my strongest subject. Thank you for these videos. From one Bob to another.

[@profrobbob]

THANKS for choosing my channel to study with and I'm glad to hear you are finding these lessons helpful...it's always nice to hear a compliment from a fellow teacher! Please share this free resource and your personal experience with the head of your math department too...word of mouth and new subscribers is how we continue to groW!

[@profrobbob]

I am a full time teacher...for 17 years now:) KZbin is my next personal goal.

[@Darcy04141]

Oh my gosh, bless. I've been going through so many videos trying to find the same style my teacher taught and this is one that helps me understand. Thank you.

[@profrobbob]

You're welcome Hayley...please sub and share this free study help with your class and teacher too:D

[@profrobbob]

THANKS...after a good nap I hope you were able to absorb all the knowledge:)

[@rinreborn7364]

its been 9 years since this was posted lol. Still it helped me understand better than other youtuber source/ thanksssssssssss

[@profrobbob]

You're welcome...thanks for choosing this channel to learn from:) Good thing math never goes out of style...only my clothes...lol

[@junedoodle]

Thank you! I'm a tutor and was able to help my tutee with your video! You are very easy to understand! I subscribed! :)

[@profrobbob]

Thank you for the positive feedback...it's nice to hear that I'm helping and reaching a full range of students, no matter what point of their lives they are at in their school career. Congrats on your future achievements! Hope I can continue to help.

[@profrobbob]

I'm glad you choose my channel to learn from in the sea of KZbin options and thank you for taking the time to let me know how helpful you found them! Please share my channel with others and continue to help my channel grow!

[@JonKimMedia]

My stats teacher is colloquially known around my school as "The Witch." But now that I've found your videos, I no longer have to fear her. Thank you so much, professor!

[@juiceitwell]

These videos have been very helpful! Thank you for taking the time to make these and for putting in all this work, it's helped me out a lot. Also, I must say you are really great at erasing things off the board in one clean swipe, I think that is commendable.

[@BrantGrz]

BAM! Thank you ROBBOB. What has taken me two weeks, you made click in 13min! You my friend have a new subscriber!

[@profrobbob]

And THANK YOU for supporting by liking and subscribing too! As you continue to watch and learn please share your learning experience and my channel with others every way you can think of so I can continue to groW and help students like you everywhere:D Our dream is to someday see an "M" next to my subscriber count...BAM!!!!

[@carlyleppala9782]

Thank you so much for these videos. You are helping me study for my Teacher Certification Test and I am re-learning math. You're awesome!

[@profrobbob]

THANKS Carly Leppala ! Good luck on your test and enjoy your new career...I hope you find it just as rewarding as I do:) "Confucius" says - Choose a job you love and you will never have to work a day in your life!

[@kehindeafolabi6905]

Your explanation dissolved my problem on this subject. God bless you

[@profrobbob]

Happy I could help...thanks for watching!

[@NightWanderer01]

Haha, I'm watching these videos as a substitute for uni textbook readings and they've been extremely helpful. THANKS!

[@laurenpears8240]

You managed to teach me more in 15 minutes than my stats lecturer has in a whole year.. thank you!

[@profrobbob]

BAM!!! You're welcome...I hope you will share my channel with the rest of your stats class and tell them to Like, SUBSCRIBE and spread the word:D

[@profrobbob]

Well, I don't know anything about Statcrunch, but the z score formula standardizes your data to fit the Standard Normal Distribution. So, if your data is determined to be approximately Normal with whatever your mean and standard deviation is, the z score converts your data to effectively have a mean of 0 and a standard deviation of 1 so you can the standard normal curve table to find your pvalue.

[@newyorkrgrl]

Almost half way into the semester and i finally understood this part-for the most part, thanks:)

[@PatSaidHi]

I've watched you since High School Algebra and now I'm watching you for College Statistics! Thanks for all your helpful videos!

[@profrobbob]

+Patricia Alcid you're welcome and thanks for your continued support and please keep spreading the word:D

[@carlosdpu]

You are brilliant! Im studying for the CFA exam and haven't seen this stuff in over 5 years.

[@profrobbob]

On my z score chart the left vertical column is the z score to the tenths values and the top horizontal line of numbers is the hundredths value. Yes, the z-score is the number of standard deviations from the mean. I hope this helps:)

[@TheStaceyAdamz]

BAM!!! Thank you for explaining this! Every other video just uses 10% for the percentile. I needed to see the 75%. You are amazing

[@profrobbob]

You are so welcome Stacey...glad I could help! Please help us keep growing by subbing and sharing this channel with everyone...BAM!!!

[@ericzhu3561]

THANK YOU for doing this, it's now only 30 days left for 2019AP, and your channel literally gave me the hope for doing well in AP stat, BAM!

[@profrobbob]

Thanks for "thanking the teacher", subbing and tuning in...now go pass those AP exams like BAM!!!

[@Patback22]

randomly came across your channel and i am in my stats class in college. this is super helpful. thanks again for your enthusiasm. a great synergistic quality i find helpful when teaching these topics. you've got my sub

[@profrobbob]

Patback22 YEAH!!! Thanks for the support and I hope you ace that stats class like BAM!!! I have my lesson organized more clearly here www.profrobbob.com/ap-statistics

[@mackenziedean7880]

Wish you taught my college stat class.. never understood it better until now! Thank you!!

[@profrobbob]

+Mackenzie Dean all you have to do is like, subscribe and share my channel with your friends and then I can be your KZbin teacher as you all study together...BAM!!!

[@mauvollis5218]

@ProfRobBob Here in 2020 where everything is online because of the pandemic, and just want to say your videos are very helpful! Thank you!

[@profrobbob]

@Mauvollis Thanks for teaching for help and choosing this channel! You're welcome...please take the time to like, sub, share thru social medias, with classmates and teachers to help us keep helping other self-motivated students like you...BAM!!!

[@profrobbob]

I hope you do great on your exam:D Glad I could be a small part of helping you get ready.

[@lavoiw]

Thank you so much you explained this better than my professor and had great examples. Appreciate it!

[@bzb34]

Did I seriously just learn a 2-3 day lesson in 13 minutes. My mind is blown. Thank you so much for this now I'm much more prepared for my test.

[@profrobbob]

And THANK YOU so much aldo b for that testimonial and for liking, subbing and choosing my channel to learn from! Please spread the word so students everywhere can have the same experience that you did...then maybe someday we will see that "M" next to my subscriber count too!

[@colyboy4]

WOW, you seriously are the only reason i am passing university statistics! Thank you

[@TheCyanophore]

I think you just ensured I continue university next year. Thank you so much, fantastic video.

[@MrLnandez]

Excellent video. Everything was clear and concise, I feel more confident working on normal dist. probalities in my Stat class

[@kehindeafolabi6905]

prof, you are a great teacher

[@profrobbob]

...another video already?! That's what I like to see...keep up those great study skills and don't forget to share this channel with everyone...BAM!!!

[@dogboston]

I'm in medical school and you are way better than my teacher, sigh I wish you were teaching my course. thumbs up + subscribed btw, very very well done.

[@yrk4938]

You are the best this is the second math class you have been helping me with! You are very clear I wish you were my professor !

[@profrobbob]

AWESOME BRK Mrs T here...We really appreciate the continued support and we hope you are sharing this channel with everyone along the way and reminding them to like and sub like you did to keep these free educational channels growing and remain free:D BTW..."Somewhere in Time" is my favorite movie...we were married to the music from it 21 years ago:)

[@kellinepickett4979]

Awesome!! Thank you for your help!! Test in one day, this is really going to give me a boost in deciphering the differences rather than just looking for x-bar or p-hat. Thank you very much!! You do a great thing for students everywhere!!! I'm off to check out those videos!!

[@christopherking531]

Bayum! You're really good at this. Just shared with my grad school classmates....not sure I even need to study anymore. You just clarified half a semester of confusion in 10mins. #SuperLike . #ProfRobBob is a lifesaver.

[@profrobbob]

BAM!!! Thanks for all the sharing we REALLY appreciate your support! Love the #SuperLike and we are glad to hear that you are finding my channel so helpful Christopher King but please remember to "Like & SUBSCRIBE" and tell everyone you share with to do the same! That's how these free educational channels groW and remain free for everyone to learn from:D...now "go do your homework" and keep spreading the word thru social media, like us on Facebook and share my channel with your teachers too:D