Two researchers analyze the same data set.Researcher A uses a two-independent-sample t test and decides to retain the null hypothesis.Researcher B uses a related-samples t test and decides to reject the null hypothesis.Which of the following is a likely explanation for the disparity in the decisions made?
A) The two-independent-sample t test had greater power to detect the effect.
B) The two-independent-sample t test was associated with fewer degrees of freedom.
C) The related-samples t test had greater power to detect the effect.
D) The related-samples t test was associated with more degrees of freedom.

Question

Quizplus · Accepted Answer

The related-samples t test typically has greater power to detect effects because it accounts for the correlation between the paired samples, reducing the error variance compared to the two-independent-sample t test.

Two Researchers Analyze the Same Data Set