For the data given in Problem 4 in Chapter 8 (plus the accompanying computer output), find (using α = .10) the best regression model relating homicide rate (Y) to population size (X1), percentage of families with income less than $5,000 (X2), and unemployment fate (X3).
a. Use the stepwise approach.
b. Use the backward approach.
c. Use the all possible regressions approach.
Regression Models for Dependent Variable: Y
SSY 1855.20200, N = 20

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Number in Model R-Square | C(p) 6.1969 MSE 25.97790 X3 30.38125 X2 Variables in Model 0.7480 0.7052 9.9594 0.0045 71.6694 102.60275 X1 0.8020 34376 0.7672 6.5055 0.7103 11.5104 2 21.60839 X2 X3 25.41000 X1 X3 31.61198 X1 X2 0.8183 40000 21.06607 X1 X2 X3