In comparing two population means of interval data,we must decide whether the samples are independent (in which case the parameter of interest is )or matched pairs (in which case the parameter is $\mu$_D)in order to select the correct test statistic.

Question

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This statement is true as the choice of test statistic (either the independent samples t-test or paired samples t-test) depends on whether the samples are independent or matched pairs.

In Comparing Two Population Means of Interval Data,we Must Decide μ\muμ

In Comparing Two Population Means of Interval Data,we Must Decide $\mu$