calculate mean, variance and stdev

[archived_user]

I’m on the quantitative part, i got the TI BAII calculator. But i find it still hard/time consuming to get mean and stdev for a data series. Getting mean is fine, except lot of pressing. But to get the stdev/variance, you will need to keep a lot of intermediate result, and this takes a lot of time, e.g. one of the practice problems had 13 data points. So what is the best/fastest way to calculate those parameters?

 

[archived_user]

Have a look a one of the several videos on YouTube to learn how to use the built-in statistic calculation programs. That will speed up your calculation and make it more safe.
Best,
Oscar

 

[archived_user]

The calculator will also give you standard deviation and variance. It’s only the data entry that you have to do.

 

[archived_user]

Learn how to use the calculator……easy points!!!! Enter the raw data and that’s it…..

 

[archived_user]

Thanks all, I found some tutorials and I could use the calculator to get stdev .
Just got one question: the data entry needs to be input once each time, even some data are repeated a few times? can i input a data and specify how many time it appeared? I believe we can do this in the CF data entry.