Sample variance?



#3

On page 419 of the latest Prime user guide, it shows how to use the variance() function. This is the population variance. Is there a way to calculate the sample variance instead?

Also, I can't find a built-in function for percentile. I could probably write something easily enough, but I'm wondering if I'm missing it somewhere...


Thanks,

Bruce


#4

From p194 of the manual:

Quote:
Tapping [Stats] displays the following results for each
dataset selected in Symbolic view.

...

sX Sample standard deviation

sigmaX Population standard deviation


Then obtain the sample variance as the square of sX

Nick


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