When the direction of difference between the sample mean and the population mean is not specified, a two-tailed test is appropriate.

Name: When the direction of difference between the sample mean and the population mean is not specified, a two-tailed test is appropriate.
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Quizplus · Accepted Answer

A two-tailed test is appropriate when we want to test if the sample mean is significantly different from the population mean in either direction (i.e., higher or lower).

When the Direction of Difference Between the Sample Mean and the Population