A researcher plans to use the t-test to compare two independent samples of data of only 15 individuals each. Consider the following assumptions that may be relevant here: (a) the sample standard deviations have to be equal (b) the data from both samples has to come from populations that are normally distributed
What minimum assumptions from the ones given above needs to be met before she may proceed?

Question

A researcher plans to use the t-test to compare two independent samples of data of only 15 individuals each.  Consider the following assumptions that may be relevant here:  (a) 	 the sample standard deviations have to be equal (b) 	 the data from both samples has to come from populations that are normally distributed 
 What minimum assumptions from the ones given above needs to be met before she may proceed?

Answer

the t-test should never be used with such a small sample at all

Answer

at least one of (a) or (b) must be true

Answer

(a) and (b) must both be true

Answer

neither (a) nor (b) is relevant but other assumptions exist that will have to be considered

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A researcher plans to use the t-test to compare two independent samples of data ...

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