Richardthughes
Posts: 9538
Joined: Jan. 2006
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for a freind, actually:
"I’ve got one population that is a sub-set of another. I know the counts in both, the means and the standard deviations. What stat test can I use to teel if the mean of the sub-set is statistically different from the known mean of the whole? I think a t-test assumes two independent sets of data which these are not."
Halp!
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