Standard Deviation

In this video Paul Andersen explains the importance of standard deviation. He starts with a discussion of normal distribution and how the standard deviation measures the average distance from the mean, or the "spread" of data. He then shows you how to calculate standard deviation by hand using the formula. He finally shows you how to calculate the standard deviation using a spreadsheet.
The calculated standard deviation is 2.7.
Intro Music Atribution
Title: I4dsong_loop_main.wav
Artist: CosmicD
Link to sound: www.freesound.org/people/Cosmi...
Creative Commons Atribution License

[@armsdragon05]

"It's not scary at all, it just means you have to do a lot of work." That's the scary part

[@YakRuski]

Nailed it

[@bighands69]

Practise it 20 times and it will become easy.

[@legendthenoah1229]

bighands69 JEWLY ANDERS CONFIRMED! ( I DON'T CARE IF I SPELLED IT WRONG!)

[@vasanthakumari9627]

by

[@ronnies.3440]

Lol

[@MorticiaObscurum]

I like how most statistics video always say "don't be scared". It's kinda soothing, in a way.

[@edsknife]

Yeah just like how yelling "RELAX" in someone's face gets them to relax

[@jean-michelgonet9483]

Like the doctors, when they say "It won't hurt a bit"

[@josephjaison321]

its because in math's statistics is easy. but for us its hard..

[@der1658]

It's like a biblical angel trying to approach you without spooking you

[@calculatorcake6209]

sometimes at night i cry myself to sleep

[@ayylmao2710]

+calculator cake i try to drink paint to easy the pain i have with maths

[@calculatorcake6209]

often times i will try to also drink away the pain....with bleach

[@tsubameakiyama231]

Sometimes it's not enough and u just have to take bleach into the exam in a water bottle but make sure it's clear bleach so they think it's water 👌

[@josephkuforiji9407]

Same

[@carson4356]

#the AP bio experience.

[@teachmeee]

Dude you could seriously teach ALLLLL OF MY MATH CLASSES!!! It took you 7 minutes to teach something that took 9 weeks to learn.

[@crouchingpantherhiddendrag586]

Mr. Andersen, you saved my life in 15 minutes with this tutorial! If I were going to have more children I would not hesitate to name them after you. I looked at this twice, and was able to solve the second problem and get it right! I looked countless other videos and all I got was crickets. The way you explained it will be easier to understand when testing time comes around. I have always had a fear of math, but I have never felt more confident since finding your lectures. I am 46, and I have 5 classes left before I graduate with a degree in Health Information Technology next spring. Whoever said you can't teach an old dog new tricks was severely incorrect. Once again, I thank you and bow in your direction!

[@kazikoy]

damn bruh

[@SkylabBeats]

Officer, the simp is right here

[@Insomnia_Animations]

@@SkylabBeats they were just being polite why is this considered simping

[@sammiepaws3175]

Hey! I've been watching your videos for all of my chemistry and math courses for the past 4 years and I just want to thank you from the bottom of my heart for making these videos! Knowledge is power and you are giving that to everyone who seeks out help through youtube. You are wonderful. Thank you so much!

[@shokofakarimi839]

I love how clear, relaxed and simple you explain. I used to always watch your vids when I was in high school and now I m doing my first year of Uni, still watching your vids, Thank you X

[@seeinbubbles]

I am taking a statistics class right now online and find that it is a little difficult for me to get a handle on, so this video helped me out so much by watching someone actually did the an example of what I need to do. I am a visual learning so this helped so much. Thanks

[@tfkalldaway]

Seriously? Why couldn't my chem teacher just explain it to me like this. THANK YOU!

[@Namiqueue]

Exactly! The teachers are dumb! ))))

[@zakiahmed6655]

oh well this is for my bio

[@seventhwave87]

oh my goodness. I've spent so much time trying to understand this concept and Mr Andersen explains it in exactly one minute and eleven seconds. Kudos to you Mr Andersen. Give this man a gold star.

[@SAM1057368]

For a person with a Linguistics background, your explanation was awesome. Very simple and clear and you also combined both formulae with an Excel work. I love that and thanks a million again! Now, I understand what it means Standard Deviation is the Square Root of the Variance :)

[@marcobagut]

Finally someone who knows how to explain this: rationale and calculation. Great!

[@hirajabbar2136]

Hello Mr. Anderson. I used to watch your videos when I was in intermediate around 6 years ago or maybe more than that. And now, after 6 years here I am again doing my MS n you saved me again. Thanks

[@alexmontes1391]

this was a phenomenal representation on standard deviation! thank you!

[@blackwolf4417]

Thank you Mr.Anderson for presenting this nice informations

[@Bozemanscience1]

Chalak Mariwany You are very welcome. I'm especially happy to hear that this video is helpful because standard deviation is a very important topic.

[@tieler151]

+Bozeman Science can you do a stand deviation video to explain this formula for standard deviation that we are learning in school o=(x1-u)2 +(x2-u)2+...+(xn-u)2/N?

[@blackwolf4417]

it was very benificial to me..thank you.

[@CMVB92]

I might as well skip all my classes and watch these video's in stead. Saves so much time and energy! Thank you!

[@789armygirl]

You're awesome. 2021 and your video is still helping people. This equation showed up randomly in my online microbiology homework. Had never seen this before, but I'm able to complete it thanks to you. 👏😊

[@Mr00000111]

I just cannot describe how much I appreciate and adore you Sir Andersen! you are a great man!

[@TheRealHawkeye]

I am a graduate student in aerospace science. For the first time in my life, we had to calculate the standard deviation on some figures. I am no stranger to math, but I am certainly a neophyte when it comes to statistics. I had little by way of instruction vis-a-vis standard deviation calculations. Your presentation was excellent! It helped me and my team with what we needed. I thank you very much.

[@NothingButCharLee]

Learnt more in 10 minutes watching the first 6 minutes of this video and doing the example than I have in the past three lessons at my school with my inadequate teacher. Three cheers for the information age!

[@Tj1991ification]

This is one of the best standard deviation videos I have watched. You are a life saver!

[@MarvinsGarage22]

Thank you Mr. Anderson. It doesn't matter how many times throughout your life that you learn this. If you don't use it you lose it. Thank you for teaching it to me again!!!!

[@GuppyPal]

Thank you for this. I am taking some upper division stat courses after about 9 years off from school, and even though something like this video is super simple, it is very helpful to go through it and refresh my memory. Also, You did a great job speaking clearly and explaining things clearly, so good job.

[@hudsonmckie]

This was really helpful! Got standard deviation so quickly with this, keep up the good work!

[@jessegarcia3700]

Thanks!! Helping me through a grad program in consumer psychology at USC. Great video, huge help, thanks for keeping it simple!

[@777vegasnites]

The information is presented very nicely here - both "on-paper" technique combined with spreadsheet data entry and formula usage.

[@ericyong3632]

Well this is one of the best videos out there but for people who want direct direct steps here ya go: Step 1: Find the mean in your data. (Add all up, Divide by how many values) Step 2: Subtract the mean from each value of your data, and square the answer. Do this for all values Step 3: Add up all results from new values, and divide by how many values (Should be same No. of values from step 1) Step 4: Square root the answer you got from step 3. The answer you get is the standard deviation

[@iRonM4n1991]

best explanation ever!!! i totally understood it i was getting so scared of how to do this standard deviation thanks for the explanation

[@beckywalton359]

Mr Andersen, you rock. I always found stats impenetrable but your videos break things down so well. Thanks!

[@florinburian7291]

This is a gem of an explanation. I wish teachers were like you

[@ericbays4123]

THANK YOU for being the only source to have made sense of this for me.

[@kagamer21]

Youre the man Mr. Anderson. Thank you for teaching me so much for years now

[@lac.2558]

Thank you! My professor in grad school assigned your video for an assignment and this was a topic I was REALLY struggling with even after having a course of research and statistics >.< thanks to your video I feel so much more confident going forward in interpreting data

[@cdee12120]

I truly appreciate every lesson I have learned from you. Thank you so much.

[@ofs4654]

Great job of explaining including interesting aspects of the bell curve. Thank you.

[@Zenaune_Hitjii]

Thank you so much Mr. Anderson for this awesome video. I finally understand what standard deviation is and how to calculate It. You helped me a great deal. Thank you.

[@cassandra6560]

Thank You!! Ran out of time in lecture today and need this information so I can complete an assignment. Also, thanks for explaining radiocarbon dating in another one. You have helped me so much this semester!

[@lennoxpoveda4151]

I been watching your videos for the pass 3 months, and on Monday I have the AP Bio test and i feel pretty confident, appreacite,. You Raw!!!!!!!!!!!!!!!!!!!

[@Lip22Gloss]

Thank you so much, Mr. Andrson! You are my greatest hero! You always explain things so simply and well, & I thank you for that. :)

[@systine.]

The intro song is amazing! I love hearing it every time.

[@fayyazahmed7126]

Superb: what i was unable to learn in four months have learned in 7.50 minutes. what an easy way of explaining.

[@lissettmanduley4654]

Thank you for being so calm and making it so not complicated!!!!

[@Andrew-fq8oy]

I dont know what I would have done without this video

[@jackforbes3011]

Just wanted to say thanks. I'm in a stats class now and the professor explained the process, but I couldn't get the answers. I think I realized that I wasn't dividing by the full value of N or n-1 based on the instructions in the question. I enjoyed being able to do the equation by hand and then see the answer; it helped me track through my steps and see where I went wrong. Appreciate this!

[@YakRuski]

This is a bloody lifesaver. I flunked my Algebra class this year so now I had to take credit recovery summer school. And man, tomorrow is my final exam. Thanks for the save dude!

[@xrain90]

Came here to relearn the standard deviation, ended up learning how to use an excel sheet. Thank you!

[@foziajfr]

I'm late to say this, but anyways Bozeman Science has been my favorite video tutor to remember old topics and learn new concepts since high school and now college.

[@deepocean2214]

Thank you so much!! I have been studying this for months and I just learned it in 10 min. thanks to you :)

[@cu99460]

Your my favourite online lecturer dude! Keep up the great work!

[@jakewayne1589]

Thank you very much, I was freaking out about my first stats test and this video really helped me with standard deviation. My friends also thank you too!

[@mollyfisher4308]

You made it so simple and easy to understand. Thank you, you wonderful man.

[@RobertMStFleur]

Teacher, you have done a great job, don't forget to use parenthesis before squaring the numbers. For example, if you have negative 2 with an exponent 2 without a parenthesis, the answer is negative four (-4). On the other hand, if you use a parenthesis (-2) with an exponent 2, the answer is positive 4.

[@slavoie]

Robert is right. Those are two different notations that produce different results. " -2 ² " is equivalent to " (-1) * (2)² " which is not the same thing as " (-2) ² ".

[@jamesgalante7967]

Im pretty sure everyone who is studying standard deviation would know this

[@amberjones8111]

Thank you so much for this video. I can't tell you how much this has helped me.

[@BeautybyRachel]

you made this easy unlike a lot of the other youtube vids, thank you

[@jeffwilson8563]

Concise and clear, thank you Mr. Anderson.

[@afafkhan2826]

Thanks for the video!! Learning from you in 2019 even though you uploaded this in 2012

[@user-pp9sj4jg4t]

I really appreciate this video it was so simple and easy to understand. My teacher made it so difficult in class no one understood.Thank you

[@randischmidling4483]

I've been a fan of yours since I've started taking classes online! I think they would benefit from referring podcasts like yours to guide us through our online learning experience! You should try it! I'm in my fourth week and NOW I finally understand how to do standard deviations... Pretty sad on my end, but kudos to you for the AMAZING learning lessons. Not to mention their short, easy, and funny! :o) THANK YOU!!

[@oniquecarmelmocha]

This was very help thank you... never understood how to do it by hand until now... thanks again...

[@pir8grl08]

Thank you Mr. Anderson! I looked at other videos about the same subject, but the teachers in those videos were using language I couldn't comprehend. There is a video included in the software we are using for the class, but the lady merely showed the TI-83 route. It is a nice short cut to check myself, but I wanted to be able to show my work. I see you have videos on other subjects as well, therefore I shall subscribe and recommend you.

[@Huckleb3rry]

Thank you for this explanation. I am currently taking a STAT course online and appreciate the walk through of this theory (something that is missing from an online course).

[@Universe.444]

i finally got it. you made it so simple. i worked out the problem and got it right. thanks a million.

[@justincole3610]

Thanks for the description! Very easy to follow

[@raziburrahman6640]

Awesome. I checked many videos before. But here Very easy to understand this.

[@LeterniteBelle]

you saved my college career

[@freybio]

Fire! My class loved this! You are my hero:-)

[@lilin5589]

That was so helpful. Thanks. Best video on standard deviation ever

[@0oumaima486]

Hello teacher i would love to say thank you that you've helped me by you're videos 10 years ago to succeed and now i have a master degree in Quality so thank you so much

[@OMGmyFACE]

Wow, thank you. The first 6 minutes of this taught me more than an entire lecture and recitation on the subject I had previously. Way to go, academia standards, eh?

[@ninoenriquez7553]

Great stuff! Thanks a lot Mr. Andersen

[@KitKat0708]

thank you, this makes so much more since than my professor

[@GetItInProductions]

This helped me a lot in a short amount of time! Thanks!

[@hani911100]

Think you. You help me enough with this video in my course. Keep going in an useful way.

[@filu7652]

Best explanation of Standard Deviation! I have a chance at passing my exam tomorrow!! Thank you so much!! :)

[@maryamomar2510]

thank you Mr. Andersen! You are the best!!!

[@ellal.1918]

I know this video is 4 years old... But thank you!!! This video made it so clear to me! Big help. Thanks again :)

[@kyllechristiandalman4181]

Sir, thank you for the video. You helped me a lot.

[@zipzap6434]

pov: you're a sophomore who blindly chose AP Biology as your class and you are now deeply regretting your decision

[@PenguinInVagas]

POV you’re a junior in the same boat 😢 how’s your junior year going

[@mamacita314]

I love you!! My Ti 83 died and I was freaking out about that scary equation, but you simplified it and my heart started back up. Thanks for this video!!!! I can't use enough exclamation points!!!!!! lol

[@mauroymgch339]

Thank you! You really help me out.

[@omaral-bayati4375]

A very good and detailed explanation, thank you !

[@mike419100]

Simply - A fantastic explanation! - Thanks.

[@MisSamIvee]

I love this channel this saves me every time!

[@MandyBasenji]

Thank you SO MUCH! You made this so easy to understand!

[@rosalieseva804]

you explain this really well. thank you very much for sharing your knowledge

[@paulbatty8679]

Awesome video - so simple to understand. Thank you!

[@JihadAlAnsari]

That was extremely helpful thank you for doing what you do.

[@Juspeachy13]

Thank you so much!!! My Statistics professor confused the hell out of me. You made it much more clear

[@frankleahy4309]

Great Video, helped me a lot! Thank you for posting

[@cynthiaarreola6290]

Thanks for helping me figure out how to do my homework! you're a life saver!

[@jamiebertrand7573]

You saved my life tonight!

[@madissentaylor5498]

This was really helpful and very comforting

[@dr.donitam.lester1947]

You are soooo good at this! It's scary for real. I am shaking with anxiety. You make it seem so simple. Thank you.)

[@chrissyk5285]

This is what I was missing. Thank you!

[@amincherki3351]

Thank you, I have an examination on the 12th and im really stressed out especially with standard deviation but this video really helped so thank you so much!!

[@11234Kevin]

Thank you very much Mr. Anderson

[@GoGoGertie]

This was incredibly simple! Thanks for taking the sting out of this!

[@_HarryFrench_]

BOSS, way better than any of my teachers, thanks

[@Rodellrich99]

Thank you for the awesome breakdown!

[@jackspedicy]

Thank you! Made things much more clearer!