Brianna has an IQ of 129 and Jenna has an IQ of 117.Brianna performs better than Jenna does on a simple reaction time test and a choice reaction time test.It is most likely that Brianna outperforms Jenna by:
A) about the same amount on the two tests
B) much more on the test of simple reaction time
C) much more on the test of choice reaction time
D) both A or B

Question

Quizplus · Accepted Answer

IQ is positively correlated with reaction time, but the correlation is stronger with choice reaction time than with simple reaction time. Therefore, it is more likely that Brianna outperforms Jenna much more on the test of choice reaction time than on the test of simple reaction time.

Brianna Has an IQ of 129 and Jenna Has an IQ