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A nurse is interested in whether there is a relationship between daily levels of stress and likelihood of a heart

attack. The stress scores (predictor variable) and risk of heart attack values (criterion variable) from a small sample of participants are depicted below (Values below are valid for this question only!)

Stress Score                               Risk of Heart Attack

(Higher values = more stress)     (Higher values = greater risk)


   6                                                     8

     8                                                     0

     2                                                     6

     9                                                     2

What is the covariance?

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covariance = -... View the full answer


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