Stats: Finding Z-value Given the Probability

[@ElffieElix]

when a 10 minute video explains something better than your professor did

[@angeliquevosloo4732]

April Morrison amen

[@karak2113]

Ikrrr

[@llucboada1010]

Love you man, 3 minutes and you fixed the problem i had placing the tail in the distribution when given the area. Thank you!!

[@amantekle127]

Not most teachers explain clearly what they are teaching but you really do. Thank you so much for that!

[@survivalguy11]

This video helped me so much, thank you! I have a stats exam this coming Monday and I was struggling to understand this because my professor doesn't communicate the best way. You made it very clear and you are very well spoken! Thanks again

[@marzlittle]

7 years later and poyersmath' video is still helping us. Thank you sir!

[@landylafortune269]

In one night I learned more than I do in one week in class. Best stat video hands down. Thank you so much. Ready for my test tomorrow.

[@cesiameza961]

Best explanation ever!!!! wishing my teacher could lecture like you

[@knuckles267]

Amazing! You did what my professor was trying to do for 2 lectures of 3 hours each! Bravo! Thank you so much

[@mryup6100]

Your voice is relaxing and the visuals along with your explanation was amazing! I don't find many videos this good on KZbin!

[@timaloveslemons]

this helped me so much! now i feel stupid for making those mistakes on my last test! i will make an easy A on this final now! thanks!

[@jeffreyluo5143]

soo... I know it's been 6 years but, how did you do on your finals?

[@brentdelosangeles2499]

I was in elementary when you made this video. This video is helping almost ten years later, thank you! *thumbs up

[@egyptianlicorice844]

"oh that's terrible" lol 4:31

[@jumanahhusain4584]

قلتلهم ايعود

[@marmaldo3462]

Army!! Hello and omg I'm struggling. I keep getting numbers off😅 I hate statistics since I was in high school

[@tayyabahussain7932]

Actual representation of every math student

[@basedland]

I'm still struggling with the ones that are structured like this P(-z0

[@castanon76]

Great instructions! Pictures and explanation while working out the calculations are a big help! Thanks for being online

[@rae-annknapp7342]

Thank you! your calmness is very helpful.

[@CaliCity10]

BY far the best explanation of SHADING area when given the AREA to find Z-value. TIP: for other people i find it it EASIER for to me UNDERSTAND it like this LESS THAN means shade from LEFT side (corner) to the right side

[@Johnny.deeeeeep]

Man, you are the boss , you teach me much better than my school teacher!

[@Confdnt]

12 years later and he's still blessing us up.

[@PandaElly]

this was super helpful! you taught me what i need to know in like 10 minutes than in my 2 hour lecture :) thanks!!!!!

[@emma147]

I have wasted so much time looking at other math videos, this hits the ball right out of the park. Thank you so much for sharing your knowledge, and teaching it so well. God bless you!

[@poysermath]

Yes Chara. If the probability you're looking for is not in the table, then choose the probability that is closest to it. It may be a probability slightly greater than the one you're looking for, or perhaps it's slightly less than it. Sometimes, the probability is exactly half way between two probabilities in the table. In that case, you can either choose the larger value, or you could split the difference between the two. Hope that helps!

[@AudreyElaineMariaDaggett]

This made it all soooo much more simple to me.

[@heidic.andaya7051]

6:17 *LMAO WHEN YOU'RE IN ART CLASS AND YOU SUCCESSFULLY DREW THIS ONE THING THAT LOOKED TERRIBLE BEFORE OOF AND YOU EVEN PAIR IT WITH A THUMBS-UP LMAO*

[@sp8571]

I been studying this for a week and was not getting it. I watched this video and understood instantly. Thanks for explaining this with such clarity!

[@katelyneortiz6602]

thank you so much. your style of teaching is super calming and very understanding

[@moviequre]

why can't all profs be like you!! Thank you so much!

[@ntsikayezwephungwayo9861]

Thank you very much. I had never taken a statistics class on this topic but now its crystal clear

[@suneperera8644]

felt so hopeless until i found this video..its 2 am exams are starting tmmrw and this vid was a lifesaver

[@pandasraawr]

could u do an example using this? finding b P(-b

[@DJ-ps2wb]

Awesome teaching! Saved me from dropping my class!

[@nathanhillman24]

Thank you so much for making this video! I'm stuck in Stats with a teacher who cannot teach to save her life. Thanks!

[@djalitanaful]

excellent video. clear voice and english. English is my 4th language, I can only understand when is accent free. thank you.

[@randomsandra4039]

Why can’t you be my stats teacher!?? I’m an older student going back for my college degree and I have “thinks-she-doesn’t-understand-math-brain” but the way you explain it makes me de-stress and understand!!! Thank you!!!⭐️⭐️⭐️⭐️⭐️ PS I think I just figured out that you kind of ARE my Stats teacher now!

[@niyatipalparti3130]

awesome explanation have been navigating to different videos but this is so far best explanation !!!

[@Lita913507a]

Thanks for the video. I'm going crazy with how to define negative or positive z-values but it become simple to me now. Really appreciate.

[@Iammillenial]

wow you make it so much more simpler. thank you!!

[@Wyiren]

sitting on my bed at 3 am as i regret taking that 6 hour nap earlier knowing i have a 9 page homework thankyou for saving me omg

[@gazelledeleuze]

U saved my life thank u sir

[@usamashah9903]

a piece of paper cant decide your life or future....so enjoy moments and make memories

[@poysermath]

Hi "jackd36". Yes, I do read these comments (good and bad ones). Well, look at the video again, beginning at minute 6:03. I show how to do a very similar problem to what you're asking about. Simply replace my P(z > ?) = 0.2389 with your P(z > ?) = 0.3300. The process is the same. Hope that helps!

[@carlvheerden]

Thanks so much for sharing these videos! I post them to my students to watch as it sometimes helps hearing someone else explain it as well!

[@syedashah9222]

simply the best stats teacher!!

[@katherinebryant3503]

BEST STATS TEACHER EVER!!

[@tibahasan2066]

I wonder why we don't want to get an area which is more than half in 7:48 , sir ? Thank you so much for your videos .. it has been a great help ! :) Bless you ^^

[@hpierce7661]

You are wonderful!... Just Wonderful!!

[@asakiqi1]

Thank you very much. Very good video.Very simple and clear explanation.

[@hipepe3172]

great video!! love you so much OMG

[@flowersintheKitchen]

Thank you very much, just watched three of your videos and i feel a bit more confident taking my quiz on this tomorrow

[@cherryblossoms4528]

4:32 that really is terrible LOL

[@isuckatthisgame]

3:10 but there isn't any number for probability that corresponds to .025, rather, you got to take a complement of that, which is .975, which is then 1.96 in terms of z score.

[@Al-Suzuki]

No there is exactly .02500

[@cool7654321]

*Throws tuition

[@mamadetaslimtorabally7363]

That's just so wonderful - thank you so much.

[@isabellec8328]

What if I don’t have the table? Can I figure this out someway?

[@shivaaanimane6750]

Yeah same doubt

[@adityakaushik8154]

No, you can't figure out the values without the table.

[@kim_2014]

Thank you , explained it so easy and broke it down step by step for me. thank you agin

[@faizanali6101]

Thanks for uploading this!

[@andre_tube..]

This video really helped me, thank you.

[@ma.victoriadiacos6178]

This video just saved my life.... thank you sooo much💖

[@anitannajoseph7796]

So simple and great sir.. It helped me really...

[@samsami8956]

Your work is great. All what you need is to improve your logistic facilities; including the camera, board, and the light.

[@invader633]

thank you!!! God Bless

[@kylienkate]

Thank you so much for making these videos! I am also using mymathlab and the triola book in my online class. I really appreciate you and your insight.

[@brianj.3274]

One Smooooth Operator! Thank you, Sir.... B

[@barbaravalencia5730]

omg your videos are helping me so much! thank you!!

[@flaiirenn]

this really helped me. thank you so much!

[@tausifmulla]

Sir, you are an excellent teacher. This helped me in my PhD studies.

[@crochetforfun8730]

Woah u use this in your PhD😮for what, sorry I’m just curious

[@tausifmulla]

@@crochetforfun8730 I used it during my initial course work. Not just this but statistics in general

[@kikianastasia]

thank youuuuuu!! bcuz of your videos now i understand very well about this..

[@william-wallace]

+poysermath 7:52 is wrong, you have an extra one??? Please explain why this is right because I am confused now...

[@avanthadilan9415]

William Wallace Let's assume unknown variable as x, question says probability of p(z>x)= 0.2389. but the positive table shows from minus area to plus area(upto +z). As you know the whole area is 1 and we want to find more than +z area, so we deduct the given area(0.2389) from 1.

[@janadrianfajut9238]

helped me alot! thanks! keep it up homie

[@jojen17]

Amazing, that cleared up so much, thank you!

[@afifaalam6341]

more then a decade later and here i am watching this days before my exam

[@UltraFEMinStinct]

YOU ARE A LIFE SAVER!

[@poysermath]

Hi Rachel, I created a separate video that answers your question about percentiles. Search for "percentile" in my poysermath channel.

[@leoniduvarov6565]

Great video! very helpful.

[@alaaemad9311]

I watched a lot vedioes but this is the best between there ❤️😍

[@Erin-bc8ic]

Is there any way to figure out how many standard deviations from a z value?

[@devarvinrc7017]

U r a life saver. Tq so much 🙏

[@NoraAlfraidi]

Hello pls can you answer me? In z table there is the same number 0.7611 why did you write 0.71? In the minute 7:58!

[@zainbsamman3932]

That was really helpful thanks a lot 🧡

[@blueyedevilboi86]

Do you have any videos that discuss how to find the probability between two variables? such as P(-.93 < x < 1.20)

[@babanlava]

Your videos are awesome

[@CIDaniels]

Very clear! Thank you!

[@asdf7219]

I just found out you can find it by invNorm(AREA, u, sd) now on the TI-Nspire

[@ronbon1767]

This saved me so much time, you are a god

[@larr2187]

12. Among 200 students surveyed, 70 are from out-of-state, 150 live in Queens and 50 out-of-state students live in Queens. If a student is selected at random, find the probability that he or she is from out-of-state or lives in Queens. I need help with this problem.

[@festus8389]

Sorry its coming late but you have to set up a contingency table..8 years later on you get your answer. AM sure you have your phd by now

[@ThapeloJustice]

Thank you sir you saved my life

[@Combat9259]

Idk how to do this because we are only allowed to use a + z score table

[@vishnusekar9112]

Cameron Huffman In that case you just have to take the compliment of it and find the corresponding z-score..but now it will have a -ve before it

[@Combat9259]

Vishnu Sekar Yeah i ended up figuring that out, but thanks for the reply.

[@EE-pq8yn]

I had a comment but i took it back...sorry. actually,your video is a big help! Thank you! I apologize!

[@AlphyEmily]

Thank you very much for the video.

[@cyovelsnchz]

Poysermath, what if the required probability is not in the table? Will i take the closest value to it? :))

[@AHumanVoice123]

You are wonderful sir. Love your videos and I learnt a lot. Keep posting please. Post some 'finding mew and s.d' please. How about poisson distribution? keep posting sir.

[@Moon-wk9yl]

That was really helpful, thank you so much.

[@aminaramly4986]

This help me alot....I am a Master student and my exam of Biostatistic gonna be tomorrow 💙💙💙

[@donnypangilinan2636]

Thank you so much with this 😘😘😘 It helps a lot.

[@RryHershOfficial]

How about finding -z and z given an area under the curve?

[@jonahreemonton5076]

Please show an example of finding the value b such that P(-0.37 < Z < b) = 0.5749?

[@friskybiscuits10]

thanks man, you are a legend

[@juliendark4208]

You are a life saver

[@se123acabaron]

Thank you very much! Very helpful video

[@jhonreylleva9971]

what if i have no book for that area of probability?

[@ascex9458]

If Z=0 that mean the area is half :)) Thanks it was awesome

[@Duckyninja50]

Great explanation

[@fridakalota370]

how did you got the 0.93?