etext problems week 5

# etext problems week 5 - 1.Individual Assignment...

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12.48 (a) Write the fitted regression equation. Y = 30.7963 + 0.0343X (b) State the degrees of freedom for a twotailed test for zero slope, and use Appendix D to find the critical value at  α df = 33 ; critical value is 2.035 (see page 782) (c) What is your conclusion about the slope? Since the p-value is 0.0068 (less than 1%), the true value is not zero. (d) Interpret the 95 percent confidence limits for the slope. We are 95% confident that the slope is between 0.0101 and 0.0584 (e) Verify that F = t2 for the slope. 2.889^2 = = 8.346321 (rounded is 8.35) 12.5 (a) Write the fitted regression equation. Y = 0.0452X + 6.5763 (b) State the degrees of freedom for a two tailed test for zero slope, and use Appendix D to find the critical value at  α df = 62 crit value: t = 2.00 (c) What is your conclusion about the slope? The p-value is less than 5% so reject Ho that the slope is zero.

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etext problems week 5 - 1.Individual Assignment...

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