The following output was obtained.

a. What is the sample size?

b. Compute the value of R2.

c. Compute the multiple standard error of estimate.

d. Conduct a global test of hypothesis to determine whether any of the regression coefficients are significant. Use the .05 significance level.

e. Test the regression coefficients individually. Would you consider omitting any variable(s)? If so, which one(s)? Use the .05 significance level.

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SOURCE Analysis of variance Regression DF SS MS 5 100 20 Error 20 40 2 Total 25 140 Predictor Coef StDev t-ratio Constant 3.00 1.50 2.00 4.00 3.00 1.33 X 3.00 0.20 15.00 0.20 0.05 4.00 X4 -2.50 1.00 -2.50 Xs 3.00 4.00 0.75