Question: 13.20 Predicting CPI For a random sample of 100 students in a German university, the result of regressing the college cumulative performance index (CPI) on

13.20 Predicting CPI For a random sample of 100 students in a German university, the result of regressing the college cumulative performance index (CPI) on the high school grade (HSG), the average monthly attendance percentage

(AMAP) and the average daily study time (ADST) follows.

Regression Equation CPI = 1.1362 + 0.6615 HSG +0.2301 AMAP + 0.0075

a. Explain in nontechnical terms what it means if the population slope coefficient for high school grade (HSG) equals 0.

b. Show all the steps for testing the hypothesis that this slope equals 0.

Regression Equation CPI = 1.1362 + 0.6615 HSG +0.2301 AMAP + 0.0075 ADST Coefficients. Term Coef SE Coef T-Value P-Value Constant 1.1362 0.5731 1.98 0.050 HSG 0.6615 0.1578 4.19 0.000 AMAP 0.3301 0.1473 2.24 0.027 ADST 0.0075 0.0151 0.50 0.621 Model Summary S R-sq 0.218624 75.82%

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