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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