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.