Question: Exercise 18.39 presented data to enable you to calculate the Spearman correlation coefficient that quantifies the relation between the speed of taking the test and

Exercise 18.39 presented data to enable you to calculate the Spearman correlation coefficient that quantifies the relation between the speed of taking the test and the test grade.

a. Does this correlation coefficient suggest that students should take their tests as quickly as possible?

That is, does it indicate that taking the test quickly causes a good grade? Explain your answer.

b. What third variables might be responsible for this correlation? That is, what third variables might cause both speedy test-taking and a good test grade?

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