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You Are Given the Following Pairs of Scores on X α\alpha

Question 18

Essay

You are given the following pairs of scores on X (height in inches) and Y (weight in lbs).
Perform the following computations using α\alpha = .05.
XY66140691557219574160721556714566135711707013068170721906914573155681506813069145691506612062131621206410268110631166412562110\begin{array}{cc}X & Y \\\hline 66 & 140 \\69 & 155 \\72 & 195 \\74 & 160 \\72 & 155 \\67 & 145 \\66 & 135 \\71 & 170 \\70 & 130 \\68 & 170 \\72 & 190 \\69 & 145 \\73 & 155 \\68 & 150 \\68 & 130 \\69 & 145 \\69 & 150 \\66 & 120 \\62 & 131 \\62 & 120 \\64 & 102 \\68 & 110 \\63 & 116 \\64 & 125 \\62 & 110 \\\hline\end{array}
a. The regression equation of Y predicted by X.
b. Test of the significance of X as a predictor.
c. Plot Y versus X.
d. Compute the residuals.
e. Plot residuals versus X.

Correct Answer:

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(a) Intercept a = -199.139, slope b = 5....

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