## Statistics – How to calculate the standard deviation

This video covers how to find the standard deviation by hand using the formula. Remember there are actually two formulas depending if your data comes from a sample or a population. Even though all of these calculations can be done by hand, a calculator is recommended so that you don’t make mistakes.

▬▬ Chapters ▬▬▬▬▬▬▬▬▬▬▬

0:00 Start

0:06 Formulas for calculating standard deviation

0:36 Example, calculating the standard deviation by hand

0:46 Find the value of n

1:05 Find the sum of squares

1:54 Find the sum and then square

2:52 Standard deviation of a sample

3:37 Standard deviation of a population

4:41 Wrap up information and ending

▬▬ Related Videos ▬▬▬▬▬▬▬▬▬▬▬

This video is related to many other topics. Check them out:

Find the variance: https://youtu.be/VgKHjVDK0uM

Using the Ti83 or Ti84: https://youtu.be/vSjs-Vehaf8

Using the Casio fx-9750Gii: https://youtu.be/TR57w69g3bc

Using the Casio fx-115ES Plus: https://youtu.be/zpLABdyepNk

▬▬ Links ▬▬▬▬▬▬▬▬▬▬▬

Website: http://www.MySecretMathTutor.com

Contact: http://www.mysecretmathtutor.com/contact-me

Facebook: https://www.facebook.com/pg/My-Secret-Math-Tutor-177258548991955/about/

▬▬ Want to help? ▬▬▬▬▬▬▬▬▬▬▬

You can make MySecretMathTutor even better by contributing community subtitles.

Subtitles: http://www.youtube.com/timedtext_cs_panel?c=UCcBOg_7QmpJFlIVMYDyUhaw&tab=2

algebra tutors,MySecretMathTutor,Math,Mathematics,How,To,Tutor,Help,by hand,without calculator,standard deviation,formula,statistics,stats,calculate,how to find standard deviation by hand,how to calculate standard deviation by hand

algebratutors.org

Thankyou very much for this tutorial it helps me a lot for my statistical biology class

Nice video! Where did you get 26.08 from? thanks!

This is super cool i really love how you teach this so easy

I wanted to do the same exercise with different numbers 😀 93,47,73,31,59,11,68,83,49,27 🙂 Guess the result? The sample is =26.08 and Population = 24.74 all random numbers we got same results. How its called serendipity… Also, yes there is a difference in third fractions…BUT what are the chances 😀

how did u get the answers to X2 24336? pls reply

Where did the 10 come from?

Thank you for thisssss !!

i cried a lot last night coz i wasnt able to understand the lesson even after watching videos from this platform (and i'll have my stats exam tomorrow) but im so glad i found ur channel, it's really easy to understand. thank you!!

could you calculate coefficient of variation using this example please

Nice. Thanks for this. Need it for Junior High School Research. Good job and I'm certain you're helping lots of people with your videos.

how did you find the value of 680.3222?

this is my 10th time watching this

where did the 9 come from ?

Should of gave us this video rather than a 1 week lecture that didn't explain anything.

I got a question. Since Standard Deviation is the Square Root of Variance, is it right to say that I can apply the Sample/Population Variance formula and simply square root the whole chunk to find the Sample/Population Standard Deviation?

Why is 10. 9

Well explained thank you

10×85511= 855110-793881= 61229/10= 6122.9*9= 55106.1

How did you get 680.3222? what am I doing wrong?

this is a lifesaver

God bless you…

doesn't really explain anything though

A very clear and understandable explanation of how to calculate standard deviation by hand 😀

Help please.

A retailer observes that the demand for a popular board game averages 40 per week with the standard deviation of 13. If the seller wishes to have adequate stock 99% of the time, at least how many games must she keep on hand?

It is good if resulted with negative number?