How To... Calculate Variance and Standard Deviation (By Hand)

When you need to manually calculate Variance and Standard deviation using pen and paper, it can be a long drawn out process prone to error. This video will show you step-by-step how to organize and make the calculations using simple sample data. A calculator is required.

[@Ambrose85]

Your videos are extremely through and easy to understand and follow. Thank you so much!

[@jackelineduran1503]

Literally, the simplest and fastest way I've seen this done, I understood it so well!

[@samanthasoto4043]

Seriously - your videos have been a pure blessing to me to understand things that haven't been properly explained with my online statistics course! Thank you so much!

[@christianne3119]

I’ve got finals in a few hours, I’m binging on your videos. Thank you for this! 🙏🏼🥺

[@zirazakaria]

Hi Dr. Eugene,
Your videos on problem solving techniques have helped me comprehend better on the topic. I am in a middle of statistics assignment, and there are still some parts that I haven't fully understand, such as the function and purpose of histogram, boxplot, control chart, scatter diagram and regression analysis. If you are able to post those videos soon, I would be the most grateful person ever. Thank you for posting your videos.

[@ferranvaldes19]

Amazingly useful and clear! You've saved my grade for tomorrow's exam, and probably my next year's entry to a new University. Many thanks Eugene!

[@starstationearth]

You are a lifesaver Eugene!

[@learitee444]

Excellent Eugene, I'm too used to calculating the standard-deviation on Excel utilising the built-in formulas. But it is of value to know how to calculate by hand; thank you for the video.

[@autumnsmith6201]

thanks for saving me with this!! My teacher went so fast and this was beyond helpful :)

[@yvettestrandberg6267]

Your videos are really hepful. Thank you!!

[@kisakyealphachelsea8400]

Thanks. You make things easy

[@recepbalk2185]

I can't find any word to describe this video list. I've learned a little statistics from SPSS software. But I always wonder about how calculations made. Thanks for this series. I hope it continues ...

[@marijose1416]

This is EXTREMELY helpful! thank you so much!!

[@InsistentlyInterdisciplinary]

Many thanks from Radboud Universiteit's linguistics programme in NL

[@idkrnwaw]

explanied perfectly

[@bg108060]

awesome. I'm not a math major, but you made this look easy. thanks

[@margaretmccormick413]

Great video! Very helpful! Thanks!

[@dr.prabhjyotkour1]

sir ...ur videos r very helpful ...pls teach me factor analysis...pls sir

[@Anubissia]

SO HELPFUL! TY!

[@debasmitarout2157]

Thanks a lot sir

[@ayatoyuriyarichin1155]

Hi sir, Thank you for your help🙏🏻. I have a quick question, when i sum up all of the (x-xbar) values i get 0 and then entire of the variance becomes zero what should i do?

[@marycarmenl.harman7430]

very useful video & thank you

[@lourde8438]

god bless your heart and soul omg u saved me fr

[@themoonlitquill]

Quick question. When it comes to rounding, do we round up for the Variance? Wouldn't the answer be 6.21? My instructor has told us to round up correct to one decimal place. Otherwise, this helped me a great deal! Thanks!

[@EugeneOLoughlin]

Hi The Moonlit Quill,
I chose 2 decimal places here for ease of use - it is recommended (APA) that test statistics be reported to three decimal places.
Dr E.

[@thandiuko1373]

Hi Sir, if you have a risk free rate in your question how do you account for it, say its 3%

[@MrBedodedo]

many Thanks ,,