You are testing the difference between two population means.The sample sizes are small.Under the assumption that the standard deviations of the two populations are equal and using a pooled estimator for the standard deviation, which of the following statements is true? A)the sample size must be increased in order to conduct a proper test B)the standard normal distribution can be used C)the t distribution with n₁ + n₂ degrees of freedom is used D)the t distribution with n₁ + n₂ - 2 degrees of freedom is used E)none of the above

Question

Quizplus · Accepted Answer

When comparing two small sample means under the assumption of equal population variances, a t-test is used with degrees of freedom calculated as the sum of the two sample sizes minus 2.

You Are Testing the Difference Between Two Population Means