In a study on caffeine use and stress, college students indicated how many cups of coffee they drink per day, as well as their stress level on a scale of 1 to 10. The data are provided in the following table. Calculate Pearson's r to determine the strength and type of correlation between caffeine and stress level. Hint: Using the means and standard deviations given to you below, as well as the z-score equation we learned last week, calculate the z-scores for each of the coffee raw values and stress raw values. You'll find a total of ten times and plug those values into the first two blank columns in the table below. Then, multiply the z-scores in each row to calculate the cross-product, and plug those values into the last blank column in the table below. Finally, use the Pearson's r equation to calculate the correlation coefficient for the relationship between caffeine use and stress level. Xcoffee = 4.0, Scoffee = 1.41 Xstress = 5.0, Sstress = 2.35

# cups of coffee Zcoffee stress level Zstress Zcoffee * Zstress 3 5 2 3 5 4 5 9 5 4