If r between the scores of both groups is high and negative then the t test for correlated samples is not a powerful statistical test.

Question

Quizplus · Accepted Answer

A high and negative r (correlation coefficient) between scores of both groups in a t-test for correlated samples indicates a strong inverse relationship between the paired scores, but it does not inherently affect the power of the statistical test. The power of the test is more directly influenced by sample size, effect size, and alpha level.

If R Between the Scores of Both Groups Is High