In the following regression, X = weekly pay, Y = income tax withheld, and n = 35 McDonald s employees.

(a) Write the fitted regression equation.

(b) State the degrees of freedom for a two- tailed test for zero slope, and use Appendix D to find the critical value at Œ± = .05.

(c) What is your conclusion about the slope?

(d) Interpret the 95 percent confidence limits for the slope.

(e) Verify that F = t2 for the slope.

(f) In your own words, describe the t of this regression.

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