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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.

  • Statistics -

    r = .8519
    yhat = 0.411 + 1.216x

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