In testing the difference between the means of two normally distributed populations,the number of degrees of freedom associated with the unequal-variances t-test statistic usually results in a non-integer number.It is recommended that you: A) round to the nearest integer. B) change the sample sizes until the number of degrees of freedom becomes an integer. C) assume that the population variances are equal,and then use df = n₁ + n₂ - 2. D) None of these choices.

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When calculating the degrees of freedom for the unequal-variances t-test, it is common to get a non-integer value. In this case, it is recommended to round to the nearest integer. This is because the t-distribution is a continuous distribution and does not have integer degrees of freedom. Therefore, rounding to the nearest integer is an appropriate method for handling this situation.

In Testing the Difference Between the Means of Two Normally