There are six independent variables, x1,x2,x3,x4,x5, and x6. that might be useful in predicting a response y. A total of n = 50 observations is available, and it is decided to employ stepwise regression to help in selecting the independent variables that appear to be useful. The software fits all possible one-variable models of the form
E(y) = β0 + β1xi
where x1 is the ith independent variable, i = 1,2,... ,6. The information in the table is provided from the computer printout.

a. Which independent variable is declared the best one-variable predictor of y? Explain.
b. Would this variable be included in the model at this stage? Explain.
c. Describe the next phase that a stepwise procedure would execute.

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Independent Variable 1.6 42 01 1.14 2.06 .73 .35 x1 3.4 2.5 -4.4 .3