6 Supposc you are interested in predicting the price of a lauter based on i vari

Question

6 Supposc you are interested in predicting the price of a lauter based on i various features. Price: the price of the laptop in dollars Speed: speed of the laptop in megahertz Charge: time (in minutes) the battery takes to charge The partial Excel results are shown here: SSUnexplained = 169838721 MSExplained 554446.062 ANOVA F Significance F 0.00479 MS Regression Residual Total Standard Error t Statp-value intercept Speed Charge Coefficients 1500.6007 10.1506 1.6284 1085.6889 14.5019 4.4568 a. Complete the ANOVA table b. Find R Explain what the number tells you about this regression model. c. Test whether risk is related to any of the X's (the overall significance of the model). Use a significance level of 0.05. d. Test whether price is related to speed. Use a significance level of 0.05. What does this result imply? e. Explain in the context of this problem what the numbers for the following coef- ficients mean: speed and charge. f. Find a 95 confidence interval for speed. What parameter does this contidence interval bracket g What is the standard error of the regression? h. Write out the regression equation. i. Estimate the price of a laptop with a speed of 33 negaherte and the charge lasts 305 minutes 37% Page 1 79 of 525

Explanation / Answer

6 Supposc you are interested in predicting the price of a lauter based on i various features. Price: the price of the laptop in dollars Speed: speed of the laptop in megahertz Charge: time (in minutes) the battery takes to charge The partial Excel results are shown here: SSUnexplained = 169838721 MSExplained 554446.062 ANOVA F Significance F 0.00479 MS Regression Residual Total Standard Error t Statp-value intercept Speed Charge Coefficients 1500.6007 10.1506 1.6284 1085.6889 14.5019 4.4568 a. Complete the ANOVA table b. Find R Explain what the number tells you about this regression model. c. Test whether risk is related to any of the X's (the overall significance of the model). Use a significance level of 0.05. d. Test whether price is related to speed. Use a significance level of 0.05. What does this result imply? e. Explain in the context of this problem what the numbers for the following coef- ficients mean: speed and charge. f. Find a 95 confidence interval for speed. What parameter does this contidence interval bracket g What is the standard error of the regression? h. Write out the regression equation. i. Estimate the price of a laptop with a speed of 33 negaherte and the charge lasts 305 minutes 37% Page 1 79 of 525

Related Questions

Navigate

• Browse (All)
• Browse 6
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.