An investigator collected data on midterm exam scores and final exam scores of elementary school students;...

An investigator collected data on midterm exam scores and final exam scores of elementary school students; results can summarized as follows.

Average SD

--------------------------------------------------

Boys' midterm score 70 20

Boys' final score 65 23

girls' midterm score 75 20

girls' final score 80 23

The correlation coefficient between midterm score and final score for the boys was about 0.70; for the girls, it was about the same. If you take the boys and the girls together, the correlation between midterm score and final score would be

Select one:

a. more information needed .

b. somewhat higher .

c. somewhat lower .

d. just about 0.70 .

Expert Solution

Option: c. somewhat lower .

orchestra answered 2 years ago

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