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homework VII

# homework VII - β 1 ≠ Step7 p-value = 0.003 14 0.5906 of...

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Martinez, David STAT 3331 Sect. 11050 Homework 7 Answers 1. Y = GPA X = Avg. Hours worked =3.2804 0.0703X Ŷ ̶ 2. ANOVA Table Source of Variation df SS MS Regression 1 3.5433 3.5433 Error 8 1.6567 0.2071 Total 9 5.2 3. r 2 = 0.6814 4. (-.1273 GPAAvg. of Hour Worked, -.0133 GPAAvg. of Hour Worked) 5. Step1: H 0 : β 1 = 0 H a : β 1 0 Step2: f crit = 3.46 Step3: Reject H 0 if f stat > 3.46 Step4: f stat = 17.1095 Step5: Reject H 0 Step6: TISETC β 1 0 Step7: 0< P-value <.005 6 . (2.6733 GPA, 3.6767 GPA) 7. a. 3.0343

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Martinez, David STAT 3331 Sect. 11050 Homework 7 b. (2.3435 GPA, 3.7251 GPA) 8. For an increase of 100lbs in weight, the mean sales price increases by \$1864.10 9. s 2 e = 0.3677 10. ( . . \$ 8 2120Lbs , . . \$ 29 0700 Lbs ) 11. + 0.7685 12. a. S ind = 0.6612 b. (\$83339.9164, \$10658.0836) 13. a. Step1: H 0 : β 1 = 0 H a : β 1 0 Step2: t crit = -2.131, 2.131 Step3: Reject H 0 if t stat < -2.131 or t stat > 2.131 Step4: t stat = 4.6514 Step5: Reject H 0 Step6: TISETC
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Unformatted text preview: β 1 ≠ Step7: p-value = 0.003 14. 0.5906 of the total variation in sales price is explained by the variation in weight Martinez, David STAT 3331 Sect. 11050 Homework 7 Regression Statistics Multiple R R Square 0.5906 Adjusted R Square 0.5633 Standard Error Observations 17.0000 ANOVA df SS MS F Significance F Regression 1.0000 7.9552 7.9552 21.6357 0.0003 Residual 15.0000 5.5154 0.3677 Total 16.0000 13.4706 Coefficient s Standard Error t Stat P-value Lower 95% Upper 95% Intercept-5.4137 3.1717-1.7068 0.1085-12.1741 1.3467 X Variable 1 1.8641 0.4008 4.6514 0.0003 1.0099 2.7183 Predicted SE CI CI PI PI x0 Value Predicted Value Lower 95% Upper 95% Lower 95% Upper 95% 8.0000 9.4990 0.2635 8.9373 10.0607 8.0897 10.9082 8.5000 10.4310 0.2004 10.0040 10.8581 9.0698 11.7922...
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homework VII - β 1 ≠ Step7 p-value = 0.003 14 0.5906 of...

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