sample standard deviation of grouped data

imalwrighty

New member
Joined
Sep 17, 2009
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I figured the correct figures for the frequency, and f times x squared, but can't figure how to calculate the formula for sample standard deviation. I put it in the calculator exactly how it is written with all the the data plugged in, but the answer comes out wrong. I wonder if I am calculating wrong, or putting it in the calculator wrong.
 
Since you haven't posted any of the necessary information, we can't see what you're working with, what you've done, or what answers you got. As a result, I'm afraid there is no way to reply. Sorry.
 
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