4. In a study on caffeine and stress, college students indicated how many cups of coffee

4. In a study on caffeine and stress, college students indicated how many cups of coffee they
drink per day and their stress level on a scale of

1 to 10. The data are provided in the following

table.

Number of Cups of Coffee Stress Level

3 5

2 3

4 3

6 9

5 4

1 2

7 10

3 5

2 3

4 8

Calculate a Pearson’s r to determine the type and

strength of the relationship between caffeine and

stress level. How much of the variability in stress

scores is accounted for by the number of cups of

coffee. Work must be shown

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