SOLUTION: What two assumptions must be met when you are using
the z test to test differences between two means? Can the
sample standard deviations s1 and s2 be used in place of
the popula
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-> SOLUTION: What two assumptions must be met when you are using
the z test to test differences between two means? Can the
sample standard deviations s1 and s2 be used in place of
the popula
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Question 1129301: What two assumptions must be met when you are using
the z test to test differences between two means? Can the
sample standard deviations s1 and s2 be used in place of
the population standard deviations sigma1 and sigma2 Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! Normal distribution and random sample are necessary.
One may use s1 and s2, but then it is a 2-sample t-test, assuming here that the sample SD is an unbiased estimator of the population SD.
