Two random samples of sizes 25 and 20 are independently drawn from two normal populations, where the unknown population variances are assumed to be equal. The number of degrees of freedom of the equal-variances t-test statistic is 44.

Question

Quizplus · Accepted Answer

The correct number of degrees of freedom for the equal-variances t-test statistic in this scenario is 43, not 44. The formula for the degrees of freedom is df = n1 + n2 - 2 when assuming equal variances. Therefore, df = 25 + 20 - 2 = 43.

Two Random Samples of Sizes 25 and 20 Are Independently