A researcher who administers an intelligence test to fifth graders and then compares their test results to the grades they earn in school is most likely trying to determine the test’s ____.?

A difference between Einstein's brain and the average brain is that:

a. It was larger in size b. It was lighter in weight c. There were more neurons d. There was no difference

What is the probability of randomly selecting a z-score less than z = –1.25 from a normal distribution?

a. 0.8944 c. 0.3944 b. 0.1056 d. 0.2112