In Example 2 on y = house selling price, x1 = house size, and x2 = number of bedrooms, = 60,102 + 63.0x1 + 15,170x2, and R = 0.72.
a. Interpret the value of the multiple correlation.
b. Suppose house selling prices are changed from dollars to thousands of dollars. Explain why if each house price in Table 13.1 is divided by 1000, then the prediction equation changes to = 60.102 + 0.063x1 + 15.170x2.
c. In part b, does the multiple correlation change to 0.00072? Justify your answer.