How to calculate Standard Deviation and Variance

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Tutorial on calculating the standard deviation and variance for a statistics class. The tutorial provides a step by step guide.
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Опубликовано:

19 ноя 2010

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Комментарии : 1,4 тыс.

@tekiteeze7128 5 лет назад

THANK YOU, GOD BLESS BROTHER! I pray for whoever reads this to excel through there current math class if you're facing any trouble!! Strive now and shine soon!

@oliviaso9726 4 года назад

7 months later: :|

@RGBY-tv4hg 4 года назад

You mean to edexel

@leesworld4541 2 года назад

Amen

@leesworld4541 2 года назад

God bless 🙏 you too

@ThinkTank438 2 года назад

Amen !

@BigBadBurrow 6 лет назад

I think it should have been noted that there are two types of standard deviation: sample and population. The method used here is sample standard deviation because it divides using n-1. Population standard deviation divides using n. Which method used depends on the data being analyzed.

@RA-sf6np 5 лет назад

BigBadBurrow : thank you! I was confused abt that but thanks to u i understand now :)

@esther4482 4 года назад

thank you. I did a practice question and was confused on where i had gone wrong

@kaylaquach8067 4 года назад

thanks I was confused

@nady1963 4 года назад

@@esther4482 .

@bhujpur 4 года назад

Yeah I I came here in the comment section just to read your comment... Problem with n and n minus one

@jaizipporah9919 8 лет назад

omg I'm not sure why my professor made this seem harder than what it is

@rukamuko 8 лет назад

Mine 2

@bighands69 6 лет назад

It can be difficult to explain or it can also be a case that your professor may not actually care.

@sarezhsharif7564 5 лет назад

omg relatable

@jcjcjcjcjcufufududuud1657 5 лет назад

Here we take it In grade 9

@dazaiosamu1972 5 лет назад

@@bighands69 most don't bahaha

@jaybee346 9 лет назад

i just learned more in 5 minutes then in my bullshit of a math class

@statisticsfun 11 лет назад

Wonderful! That is my goal to help students learn, so I appreciate your comments. Make sure that you like MyBookSucks on FaceBook (see the link in the video description). This will help others find the educational videos, so essence you are helping other students.

@statisticsfun 11 лет назад

Thanks for the compliment. I always appreciate the feedback. By the way I am getting ready to load a video about degrees of freedom (n-1) for standard deviation and variance. Make sure if you like MyBookSucks on FaceBook (see the link in the video description). This will help me spread the word about the educational videos.

@FundamentalTradingTutorials 4 года назад

I don't even know how else to tell you "THANK YOU" You're my superman... You literally saved my grade 😭😭😭

@JC-xk8vh 7 лет назад

I found this video a year ago, and here I am again, getting my behind saved by this awesome technique. You Sir are a Legend in my book.

@charliebrowniest72 8 лет назад

As a mother going back to college in her 40's, I was struggling with Statistics. My college course is online which makes getting help from an instructor very daunting. I appreciate what you do very much! Everything just sort of clicked and made sense while watching your video.

@WockOps Год назад

how did you do? I hope all went well!

@statisticsfun 12 лет назад

Thanks for the question. The 6 is the number of observations (n).

@coleklusman9053 4 года назад

Thank you

@karinaavazqueztorres4027 2 года назад

What does that mean?

@statisticsfun 10 лет назад

I always appreciate hearing that my videos are helpful. Thanks!

@alexdevries1212 4 года назад

This helped me so much, my professor made it into something 10x harder thank you

@name.7463 4 года назад

Learnt more in 5 minutes than I did in hours of classes... thanks!

@timelesstovy 4 года назад

I learned an entire unit in 5 minutes. Short and easy to understand, thank you !

@thestravinsky 7 лет назад

I have been studying for a comprehensive math exam covering algebra to calculus and this is by far the most helpful video I've watched. Excellent job!

@aneshaberry5901 2 года назад

This video is 12 years old at this point, yet it helped me sooo much! If you're still out there doing these videos, I just want to tell you thank you! Before than any textbook can explain!

@Jacqueline-bm7di 9 лет назад

Wow! Thank you so much! I have been so confused for the past few days on how to figure out the standard deviation, I knew the formulas and procedures but you just explained it so incredibly clear and patiently. You are so amazing and you get a 10+ rating on teaching, thanks so much for posting up this video. Amazing tutorial!!!! (This is coming from a person whose weakest subject=MATH!).

@oscarwilde399 6 лет назад

I've been doing stats for years, and I don't think I've ever seen the variance calculation explained so well. Good job!

@statisticsfun 11 лет назад

Appreciate the feedback and you are very welcome. Make sure you like MyBookSucks on FaceBook (see link in video description). This will help others find the educational videos.

@statisticsfun 11 лет назад

I appreciate the compliment! Make sure you like MyBookSucks on FaceBook (see link in video description). This will help others find the educational videos.

@cleaningthegutters 9 лет назад

It's been 30 years since my statistics class. I was hoping to refresh my memory so I could help my daughter. I'm going to send her to this tutorial (and any other's you have posted)! So easy to understand. Even your tone of voice says "you can do this!"

@statisticsfun 9 лет назад

Thanks for you kind words. Good luck to your daughter as well! I have maintained for a long time that statistics is not a difficult subject it is just taught poorly and the resource materials (books) are bad as well.

@adrenalinemadness3340 4 года назад

OMG thank you, you save me, I have a test in like 10 minutes and didn’t know how to get the standard deviation

@statisticsfun 10 лет назад

Thanks Tom. I always appreciate that my videos are helping students pass their classes. Good luck in your classes too.

@ebonycat69 5 лет назад

I have learned more in this five-minute video then I learned in whole month of doing Statistics! Thank you for your expertise!👍🏽👏🏾

@asghernaqvi7916 7 лет назад

thank you so much man! This will help me for the exam!

@Chy_Udeh 5 лет назад

Thank you very much! I never thought I could ever understand the standard deviation this friendly and simple way! Has always been one scary topic for me!! Hugs!!!

@jbeasley0808 6 лет назад

Even 7 years later this is like one of the best videos I've seen about Standard Deviation and Variance, this is really going to help me with my Research Methods and statistics exam, thanks for the video!! Good Job!!

@cosmosmercy 10 месяцев назад

I am writing research methods and statistics tomorrow 😊

@segun927 5 лет назад

Thanks Man. My entire statistics class can't be compared to this 5 mins of simplified explanation. Professor made it like rocket science.

@thomas.edgerton 8 лет назад

The ad told me to drop out of college...

@payasolocote7360 8 лет назад

+Thomas Edgerton go ahead bro

@jtthelion874 6 лет назад

Fuck me i died when i read that phahahahaha for a 2 year old comment that tickled me

@hfjgfkfhhfkkk4335 6 лет назад

+JJustin what

@ramithjayasuriya 5 лет назад

hahahahaaaa

@OppaiGod 5 лет назад

Same

@wolfygongora4002 9 лет назад

Great Video lecture... pretty much makes my life easier.. a bit of advice.. Try using a better mic or boosting it .. seriously had to double the audio on my media player to hear you loud enough

@O_Oxxx 6 лет назад

Great video, one of the very few on youtube that put everything into simpler terms. This was extremely helpful.

@erikalachica2808 5 лет назад

This has helped me in answering a question I didn't know how to deal with. Thank you so much, sir!!

@nataliasayedarous9291 9 лет назад

i was taught a diff way to do this. I really like the way you solved this problem. That i will be using your method. Thank you so much for explaining!!

@TerryOnDemand 8 лет назад

You Are A Life Saver!!! I was So lost Until this video!!!! Thank You!

@statisticsfun 8 лет назад

+Latoya Wyatt You are very welcome. Hopefully you will get a chance to like and share the videos. This will help other students find them.

@sonji1 8 лет назад

+statisticsfun love it but I'm still lost lol

@FeralGhoulash 4 года назад

This is such a great video. I got injured and missed 3 classes before returning, and this is the best explanation I’ve found!

@mduralia 4 года назад

Excellent job taking some rather complex information that is often confusing the students and putting it into simple terms that are easy to follow and understand. Well done

@sunnygojo 9 лет назад

Thank you so much ! Just understood 3 chapters of work with this lol.

@statisticsfun 11 лет назад

Thanks for for your feedback. The RU-vid audience is very diverse and what is required to learn by professors around the world is even more diverse. In this video I try to help students understand how to make this calculation instead of just providing them a formula to plug and chug.

@AfiOyeTheNurse 5 лет назад

the chart saved my LIFE! Ugh, my professor was just droning on and on. Thank you so much!

@unknownn1073 4 года назад

Thank you so much for this sir, I cried from how relieved I felt to finally understand this.

@pinkyjt123 11 лет назад

that was a really clear and helpful video - i have my geography exam tomorrow! thank you so much :)

@alexredpath-potter861 9 лет назад

You're the real MVP

@statisticsfun 10 лет назад

You are very welcome. Make sure you like MyBookSucks on Facebook (see link in video description). This will help others find the educational videos.

@DaSippPrincess 8 лет назад

Thank GOD for you. A lot of instructors on here assume people remember how to do this stuff. I AM SO HAPPY that I found someone to take me step-by-step. God bless you and thanks :-D

@IrisBeloved 10 лет назад

That was fantastic, so organized and straight forward!

@lavakushupadhyay8353 5 лет назад

Hii

@statisticsfun 10 лет назад

That is a good question. If you go to about 3:36 in the videos where I add up the column of information that equals 166, this is SS or Sum of Squares. Your professor may use a different formula (computational), but it is the same thing. Make sense?

@MrSwimmingmango 10 лет назад

Currently in Algebra 1, in 7th grade. This videos are so helpful. You are the best teacher on RU-vid, and your videos are very professional

@beccas5657 5 лет назад

wow. You showed me more in this short tutorial than my Stats Prof. has in the past 6 weeks ! You're awesome!

@statisticsfun 11 лет назад

Meghan, Yes I do my own animation. I use a variety of different software including photoshop, illustrator, HTML5, Final Cut, GarageBand and a few other products. Each video takes me a long time to create. My rule of thumb is each minute of video takes about 12 hours to create, so a 7 minute video takes me about 84 hours of development time.

@davebyers4154 4 года назад

Wow. Well thank you very much for all your hard work! It is well appreciated!

@jeboyguden4429 2 года назад

How to get the standard deviation?

@thugjuice69 10 лет назад

good video short an sweet to the point good symbology and use of color and charts and all that goooood stuff. thanks. now! off to my finaaal!

@the.fitmuslim 8 лет назад

Wow! Amazing and straightforward. In 5 minutes I understood more than 2 weeks with my professor. Thanks!!

@daebelly9844 9 лет назад

Thank you for making this! I find this much easier to understand than almost any other video, which gives almost completely irrelevant instructions or is too complicated and fast for me to understand.

@karlitosway7474 8 лет назад

thank you SOOOOO MUCH!! I have a test on this tomorrow and before I saw your video I didn't know jack shit. YOU MY FRIEND ARE A GRADE SAVER :)

@engr.enciso 5 лет назад

same situation

@holyknight51 7 лет назад

I am taking AP Statistics this year, i have a feeling i'll be watching alot of your videos.

@tatianeribeiro7628 7 лет назад

holy knight 5455566jgdlor56

@lavakushupadhyay8353 5 лет назад

Hii

@statisticsfun 11 лет назад

You are very welcome. Make sure you like MyBookSucks on FaceBook (see link in video description). This will help others find the free educational videos.

@RandaElsayed 4 года назад

I never learn statistics with english language until starting Master's degree, then soon I watched your videos I feel like you are the best teacher ever in statistics. I appreciate your work and every single video you did for us.

@haingurajoseph378 Год назад

I never understood this things in university, until I watched this helpful video. Thanks alot

@quetzalamaru 10 лет назад

Wow. Please post anything you want. I'll watch it, even if its not my course to learn.

@didierngombo6960 9 лет назад

Your explaination is so easy to understand. Thanks!

@statisticsfun 9 лет назад

Didier Ngombo You are very welcome. Hopefully you will like, share, subscribe, If you get a chance could you please like our FB page. www.FaceBook.Com/PartyMoreStudyLess It will help others find the videos.

@KaylaReall 9 лет назад

This really helped me a ton. You made it so easy to understand, in such a short time. Thank you!

@statisticsfun 10 лет назад

That is always great to hear and good luck on your exams as well.

@amirbagheri100 7 лет назад

Square rot

@pilot4910 5 лет назад

Ruut *

@alexandra2671 5 лет назад

Rowt*

@rylaidarksorrow1021 5 лет назад

RUT*

@90kapo 5 лет назад

Reot*

@jogeshkumarsharma2969 5 лет назад

Raaat*

@PtoArchAngel93 8 лет назад

AWESOME VIDEO!!!!!! excellent thank you so much, please keep doing what you're doing!!!!

@statisticsfun 8 лет назад

+PtoArchAngel93 You are very welcome Hopefully you will get a chance to share and like the videos. This will help others find them.

@flyhigh9410 8 лет назад

bro, the voice volume is so down. make it up, plz.

@willadams8558 7 лет назад

Voice volume is very low in this vid. Headphones are almost required!!!

@loraphelps4836 10 лет назад

THANK YOU FOR YOUR VIDEO!!! i am in online classes and i was looking through videos that had a breakdown and couldn't find any. Yours was exactly what I was looking for.

@andersonamara 9 лет назад

Oh my goodness! This was so helpful! Thanks so much! I have my first college exam tomorrow in Stats and was freaking out because I didn't understand standard deviation! Sir, you deserve an award!

@sandipani333 10 лет назад

Thank you sir Good job . :) :)

@vincentperom2845 5 лет назад

Damn it dude, I love you 3000

@scarlettmoore8868 8 лет назад

This video was fantastic. I left a lecture today feeling confused as these calculations were not explained properly. This is a lot easier than i thought!

@Pardaillan81 6 лет назад

This is hands down the best video I've seen on the subject. Very well explained and beautifully presented. Thank you very much!

@irisrivera2029 7 лет назад

thank you very.. very well explained

@shellyeditsalot 7 лет назад

writing a test soon? if so, same here. good luck!

@NickVanzwol 10 лет назад

Color coordinated, great pace, and detailed. This video makes me so hot.

@jimmyvictor13 6 лет назад

dyyying!!!

@jerad248 4 года назад

Loool wtf?!

@getdown8990 4 года назад

omggg dawg lmao

@letsgodavid4885 3 года назад

This man really got turned on to this😂

@rafhaelgonzales3436 3 года назад

down bad

@statisticsfun 11 лет назад

You are very welcome. I think you will find some of my videos on advance topics like ANOVA and Chi Square are even better. I have spent many hours designing and creating them. Make sure you like MyBookSucks on FaceBook (see link in video description). This will help others find the educational videos.

@Politically-incorrect-brian 5 лет назад

thank you for this awesome video! my professor recommended a different video and I almost dropped the class, then I saw your video and realized how easy it was!!!

@yungfillly 9 лет назад

neat and simple. i like this. thanks bruh

@statisticsfun 9 лет назад

rich homie Appreciate that! Hopefully you will like, share, subscribe, If you get a chance could you please like our FB page. www.FaceBook.Com/PartyMoreStudyLess It will help others find the videos.

@mskyny2214 7 лет назад

@staisticfun how did you get s=5.74 I got a liitle lost at that part

@xetmal4125 5 лет назад

Ms Kyny square 33.2 and that’s weee you get 5.74

@abduljalilaltao3686 4 года назад

Its 5.76

@lesleymarygarcia1494 4 года назад

if i squared 33.2 and i get 1102.24, how do i find the correct answer which is 5.76?

@nicoleetaylor7649 4 года назад

Lesley Garcia find the square root of 33.2 not square 33.2

@majacuic5877 5 лет назад

The best statistics videos on RU-vid, it's so easy to understand! Keep up great work :)

@statisticsfun 11 лет назад

You are very welcome. Make sure you like MyBookSucks on FaceBook (see link in video description). This will help others find the educational videos.

@GeorgeLee85 8 лет назад

why n-1? There are 6 samples and each have a equal probability of 1/6, why divide by 5?

@iamyourmama9933 8 лет назад

I was wondering the same thing

@gabbyrodriguez8977 8 лет назад

+wenhao li It eliminates bias

@kgomotsegodikago2686 8 лет назад

+wenhao li have seen that in sum vids nd i wonder y eliminate another 1

@xXxXLoneWolf103XxXx 8 лет назад

Those are the values that are independant of the mean value. Im taking stats right now in uni and by no means an expert. Thats what I've been taught and it makes enough sense to me to know its for good reason

@soho1080 7 лет назад

The -1 is called losing a degree of observation if you're calculating a SAMPLE variance. If you DO have the entire population, you should/can use n for the population variance.

@NaughtyNecro 10 лет назад

Be my teacher. Please.

@Le_Pidgy 5 лет назад

Maths makes you stay up at night and so does meth. Math=Meth?

@Mohamedahmed-em2ne 4 года назад

Who is here cuz tomorrow is exam

@arsalmairaj5870 4 месяца назад

After 1 hour bro 😃

@organizedmicrowave4414 4 месяца назад

20 minutes

@deshilseelan5075 2 месяца назад

@@organizedmicrowave4414at the exam

@MoizPlus-1D 2 месяца назад

@Cat-Rain 27 дней назад

@scoopmaster69 10 лет назад

Thank you so much! You're the reason I'm gonna get an A in stats this semester!

@PianoChuck 7 лет назад

You're very good at teaching. Thanks for keeping it simple and not all in technical terms.

@tejassrirama4106 5 лет назад

Who's here on 9/13/2108?

@ilaser4064 5 лет назад

I'm from the future, the RU-vid service as you know it was shut down on 7/1/2067

@jacobjohnson4763 5 лет назад

I'm from further into the future, the RU-vid Retro Classic service was started again as an elementary school project in 2096 as people romanticized about the days before instant data sharing across all human brains on the network. Modern (postwar 2077+) humans actually enjoyed the way you primitive humans once spent hours endlessly watching video after video to learn rather than just instantly having the knowledge on demand. They feel like they got a bigger reward from putting in the extra work.

@diabetic69 5 лет назад

S¤up. I. fuTuRe. bOi. I. @m. frOme. thE yEaR 45 nh . I .aRe. cOn fUzRl ,oN Y . bOi .heEr . spell . wOng.

@mikedanielespeja6128 5 лет назад

@@diabetic69 so I don't know what year I'm from, but the earth as you called it is shattering. The people within the ultra neural link have all been corrupted by a virus as seen from the log above me and we, the surviving community of carbon-based humans are slowly dying from the radiation outside. This is Lieutenant Mike signing off.

@spectre4962 6 лет назад

HOW THE HECK DO YOU GOT 5.76

@mona4696 4 года назад

√33.2

@SUCHARD07 6 лет назад

Finally!!! After watching various confusing explanations about SD and finally found one that is so clear precise tidy and you even paused for thoughts. Thank you so much!!!

@briannakenan9561 5 лет назад

The color codings, the clear & calm explainations, the arrows... how could you dislike this video ? 🧐

@hostilityy 8 лет назад

why are you whispering?

@Le_Pidgy 5 лет назад

ASMR maths

@salnaud8898 2 года назад

Appreciate the simplicity has been used in your videos.

@rednidi3 8 лет назад

This just taught me better than a 50 minute lecture did. THANK YOU LIFESAVER!

@jhx42x 9 лет назад

Awesome video! I was stuck for 2 hours, saw your video, and pushed ahead.. thanks a bunch.

@ingridcornejo4515 7 лет назад

Thank you so much!!! the way everything is explained, and simplified is perfect! please keep making these videos you're an awesome teacher!!

@Lasciel_Raith 5 лет назад

Nine years later, and this video is still helping people. Thank you!

@caroljackson767 3 года назад

Thank you so much for making an otherwise lengthy calculation so much more simple and faster. THANK YOU.

@CameraCalc 11 лет назад

Thanks, RU-vid did truncate the link. I will put a new one up shortly. You are helping a lot of people, please keep doing what you are doing.

@statisticsfun 10 лет назад

You are very welcome. Make sure you like MyBookSucks on Facebook (see link in video description). This will help others find the educations videos.

@thiengnyamyaath1654 8 лет назад

Since i have been watching online example, this is the only one example I understood better than all, excellent job.

@statisticsfun 11 лет назад

Great to hear. I have often thought that statistics could be taught visually and more people could understand it -- especially those that are visual learnings. I do have videos on economics, algebra and calculus too.