When we test for differences between the means of two independent populations, we can use only a two-tailed test.

Name: When we test for differences between the means of two independent populations, we can use only a two-tailed test.
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We can use either a one-tailed or a two-tailed test when testing for differences between the means of two independent populations. The choice between a one-tailed or two-tailed test depends on the research question and hypothesis being tested.

When We Test for Differences Between the Means of Two