Student's t test for correlated groups is _________.
A) more powerful than the sign test because it uses both the magnitude and direction of the scores
B) less powerful than the sign test because it uses only the magnitude of the scores
C) impractical because we need to know s
D) generally less powerful than Student's t test for independent groups

Question

Quizplus · Accepted Answer

Student's t test for correlated groups uses both the magnitude and direction of the scores, making it more powerful than the sign test, which only uses the magnitude of the scores. Knowing the standard deviation (s) is required for the test, but it is not impractical. Additionally, the power of the test can vary depending on the specific data and research question, so it cannot be generalized as generally less powerful or more powerful than Student's t test for independent groups without further context.

Student's T Test for Correlated Groups Is _________