{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

test2ans-3u03-2011w

# test2ans-3u03-2011w - ECON 3U03 Test 2 Instructor Shintaro...

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

ECON 3U03: Test 2 Instructor: Shintaro Yamaguchi March 8, 2011 1. Chapter 3 (a) 0.898/2.123=0.423 (5 marks) No partial credit. (b) The test statistic is 0.321/0.123=2.610 (4 marks). This follows t -distribution with DF = 36 (2 marks). Draw the same graph as Figure 3.7 on p. 67 (4 marks). The test statistic must be used in the graph. No other partial credit. (c) The test statistic is (0.321-0.5)/0.123=-1.455 (4 marks). The critical value is t . 10 , 36 = - t . 90 , 36 = - 1 . 306 (4 marks). Because the test statistic falls in the rejection region, the null hypothesis is rejected (1 mark) and the alternative hypothesis is accepted (1 mark). No other partial credit. (d) The critical value is t . 995 , 36 = 2 . 719 (4 marks). The confidence interval is [0.321-2.719*0.123, 0.321+2.719*0.123]=[- 0.013, 0.655] (6 marks). Up to 6 marks are awarded when a wrong critical value is used. No other partial credit. 2. Chapters 4 and 5. (a) SST = ( 38 - 1 ) * Var ( y ) = 37 * 2 . 54 = 93 . 98 (4 marks). Notice that ˆ σ = p SSE / ( 38 - 3 ) . Thus, SSE = 0 . 752 2 * ( 38 - 3 ) = 19 . 792 (4 marks). R 2 = 1 - SSE / SST = 0 . 789 (2 mark). 2 marks are deducted if the answer says SST = 38 * Var ( y ) , because this is a biased estimator.

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