When sample sizes are less than 30,a test for the differences between two population means has n-1 degrees of freedom.

Name: When sample sizes are less than 30,a test for the differences between two population means has n-1 degrees of freedom.
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When sample sizes are less than 30, a test for the differences between two population means has degrees of freedom calculated using the formula (n1-1) + (n2-1) where n1 and n2 are the sample sizes for the two populations being compared.

When Sample Sizes Are Less Than 30,a Test for the Differences