posted by Nicole on .
In a study of caffeine and stress, college students indicate how many cups of coffee they drink per day and their stress level on a scale of 1 to 10. The date follow:
Number of Cups of Coffee 3,2,4,6,5,1,7,3
Stress Level 5,3,3,9,4,2,10,5
Calculate a Pearsons r to determine the type and strength of the relationship between caffeine and stress level.
Determine the regression equation for this correlation coefficient.
r = .8519
yhat = 0.411 + 1.216x