Finding the Standard Deviation of Grouped Data Using TI-84 

holy freak I was trying to do this by hand and then I found your video, bless you! You saved me 500 hours!

This video walk-through has saved me so much time! Thanks for posting

you can also just use 2nd (-) for Ans, and square it

You just saved me several hours of trying to do this by hand lol thanks man.

This is just an ESTIMATE!

Hey, thank you so much. I am learning this in my college stats class and I was pretty lost till I watched this!

You explained this so well...THANK YOU !!!

thanks for the video, was trying to calculate mean and standard deviation by hand but this information makes it much easier

wow thank you so much , this video really helped me out with my math studies homework.

Thank you so much Josh! Very good explanation. I am having a problem entering L1,L2 when I heat calc then 1-var stats , The screen looks like this : List: L1 FreqList: Calculate The problem with is screen is that it doesn't let you put cooma (,) between L1 and L2 . Can you please help to make screen to look like yours. Thx

saved me for my precalc test, thanks so much

Sir you are a life saver !! Thank you !

rats. for some reason there is no sound but when I add 539 + 602 = 1141/2 I get 570.5, not 569. How did you get 569?? Thank you

Life saver

Awesome! This helped me a lot. Thanks...

Thank you so much! This was very helpful!

So so helpful! Thanks!

Great video man!

Thanks for the homework help!

at the end of the videos comment...you got yourself some outliers. would a cat and wiskers plot illustrate this?

Thank you so much I needed this

Thank you this was very helpful

Thank you!

Thank you.

Very helpful. I need a tutor for my Busi. Stats class. Any sugg?

It is not possible to see the last column's number range.

Thank you man

THANK YOU !

this helped soo much!!! thanks!!

THANKS!

Thank you very much :)

I was able to follow you all the way through entering the data, but when i hit the stat and selected 1 var it did not give me the same screen as your & i'm using the same calculator. could you tell me where i'm going wrong?

I love your video. I have a question. When I hit STAT, CALC, 1 - 1-VAR STAT, LIST: L1 ( Here is when you say to imput a comma. my alphabet always comes up but when I turn the alphabet to an arrow the comma doesn't seem to want to work here as it does work in my other screens) Do you know of a remedy for this? Thank you, :)

Thanks man

Thank you!