Eastwood's BA201 Assignments

Homework #16 Solutions

37.        H_o:  r ³ 0         H₁:  r < 0         Reject H_o if t < -1.701               df = 28

Reject H_o.  There is a negative correlation between the selling price and the number of miles driven.

38.        H_o:  r ³ 0         H₁:  r < 0         Reject H_o if t < -1.697

Reject H_o.  There is a negative correlation between square feet and rental rate.

39.        a.         r = 0.589

            b.         r² = (0.589)² = 0.3469

            c.         H_o:  r £ 0         H₁:  r > 0         Reject H_o if t > 1.860

H_o is rejected.  There is a positive association between family size and the amount spent on food.

40.        a.         r = 0.307

            b.         r² = (0.307)² = 0.0942

            c.         H_o:  r £ 0         H₁:  r > 0         Reject H_o if t > 1.812

H_o is not rejected.  We have not shown this to be a relationship between the variables.

            b.        

            c.         H_o:  r ³ 0         H₁:  r < 0         Reject H_o if t < -2.896

Reject H_o.  We can conclude that there is a negative association between months owned and hours exercised.

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