With reference to Exercise 11.78, use the theory of Exercise 11.61 to calculate the multiple correlation coefficient (which measures how strongly the damage is related to both weight and distance).

Data From Exercise 11.78

Data From Exercise 11.61

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11.78 The following are sample data provided by a mov- ing company on the weights of six shipments, the dis- tances they are moved, and the damage that was in- curred: Weight (1,000 pounds) Distance Damage (1,000 miles) (dollars) XI X2 y 4.0 1.5 160 3.0 2.2 112 1.6 1.0 69 1.2 2.0 90 3.4 0.8 123 4.8 1.6 186