Statistical Analysis for a Regression Equation
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In the following regression, X = monthly maintenance spending (dollars), Y = monthly machine downtime (hours), and n = 15 copy machines. Please view the attached file for the required data.
(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 a = .05.
(c) What is your conclusion about the slope?
(d) Interpret the 95 percent confidence limits for the slope.
(e) Verify that F = r2 for the slope.
(f) In your own words, describe the fit of this regression.
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(a) Write the fitted regression equation.
y = 1743.57 - 1.2163x
(b) State the degrees of freedom for a two-tailed test for zero slope, and use Appendix D to find the critical value at alpha = .05.
df =13, tcrit = +/- t_0.025, 13 = +/- 2.160 ...
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