HW7sol

# HW7sol - 1 Plot the data for the two populations on the...

This preview shows pages 1–2. Sign up to view the full content.

1. Plot the data for the two populations on the same graph, using different symbols ( v= ) and lines. Does the relationship between speed and operating cost appear to be the same for the two makes of tire? No, the two lines appear to be quite different. In particular they have different slopes, so that the relationship between cost and speed is different for the two makes of tire. 2. Examine the question of whether or not the two lines are the same. Write a model that allows the two makes of tires to have different intercepts and slopes. Then, perform the general linear test to determine whether the two lines are equal. State the null and alternative hypothesis, the test statistic with degrees of freedom, the P-value and your conclusion. 0 1 1 2 2 3 3 Y X X X = β +β + ε where X 1 = make, X 2 = speed, and X 3 = X 1 X 2 , allows the two makes of tire to have different intercepts and slopes. For make A (make = 0) the intercept is β 0 and and the slope is β 2 .

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern