How to Do the Standard Deviation Shortcut (alternate) Formula ✔

Shortcut to standard deviation in statistics involves looking at the formula for the standard deviation and finding an easy way to do the calculation.

The "shortcut" standard deviation formula only uses x and x-squared as opposed to variance formulas. The "shortcut" formula is particularly useful for large data sets. This video will show you both ways to calculate the standard deviation and demonstrate that both give you the same result (very important).

Shortcut to statistics:

what is the standard deviation

[Alpha-Squad]

I just got extra credit in my C++ class thanks to you.

[xXblinnyboyXx]

I was finding average sensor values to determine origin points using an Arduino and didn't want to stores 3000 data points. This new equation saved me! Thank you!

[yashgupta]

I'm subscribing just because of Daizy(your cat)...

[saysHotdogs]

If you find the variance the same way and take the square root after, it’s a tiny bit less confusing without that radical looming overhead the whole time.
It’s the same exact thing, just modified for people like me who get visually intimidated lol

[OkayKeith]

does anyone know to put this formula into excel?

[ivory]

thanks it helps specially when I am working with a sample size of over 20.

[SanjaySingh-pnuc]

thank you sir for sharing tha alternate method....

[anthonyboragine]

awesome video thanks man! keep up the good work. I appreciate it

[lcgreenscreen]

wow very professional, will get confused by math again

[itsnotmeitsyou]

Ok I have been struggling with. A problem but my problem has classes! Like 20-29 30-39 4-49 50-59 60-69 70-79 80-89 with frequencies! I can’t seem to be able to finish it!! It’s simpler when I have just numbers like in your problem but this one is killing me!! 🤦🏽‍♀️🤦🏽‍♀️🤦🏽‍♀️🤦🏽‍♀️And I have. A test on Tuesday!! Help!

[ayushprakash]

It's not n-1...its simply "n"

[nuzhatali]

In second method u have taken wrong value of average or mean ..that is 6 and u use 5 in place of 6 ..so using 2nd formula gives here the wrong answer...