If the variances are not known, and one or both sample sizes are less than 30, the F -test must be
used.

Name: If the variances are not known, and one or both sample sizes are less than 30, the F -test must be used.
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Question

Quizplus · Accepted Answer

The F-test is used to compare variances between two samples, not to test means when variances are unknown. When sample sizes are small and variances are unknown, a t-test with pooled or separate variances is typically used.

If the Variances Are Not Known, and One or Both