Chapter 10_Solution_1

# Chapter 10_Solution_1 - QAS129:001 CHAPTER 10 Q&A...

• Notes
• 2
• 100% (1) 1 out of 1 people found this document helpful

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

QAS129:001 Instructor: Dr. Yudan Zheng CHAPTER 10 Q&A I. Multiple choice questions. 1. The t test for the difference between the means of 2 independent populations assumes that the respective a) sample sizes are equal. b) sample variances are equal. c) populations are approximately normal. d) All of the above. ANSWER: c 2. The t test for the mean difference between 2 related populations assumes that the 3. If we are testing for the difference between the means of 2 related populations with samples of n 1 = 20 and n 2 = 20, the number of degrees of freedom is equal to 4. If we are testing for the difference between the means of 2 independent populations presumes

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

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

Unformatted text preview: equal variances with samples of n 1 = 20 and n 2 = 20, the number of degrees of freedom is equal to a) 39. b) 38. c) 19. d) 18. ANSWER: b 5. When testing for the difference between 2 population variances with sample sizes of n 1 = 8 and n 2 = 10, the number of degrees of freedom are a) 8 and 10. b) 7 and 9. c) 18. d) 16. ANSWER: b 6. In testing for differences between the means of two related populations, the null hypothesis is QAS128:001 Instructor: Yudan Zheng a) : 2 D H μ = . b) : D H = . c) : D H < . d) : D H . ANSWER: b 7. In testing for differences between the means of two independent populations, the null hypothesis is: a) 1 2 : H-= 2. b) H : 1 – 2 = 0. c) H : 1 – 2 > 0. d) H : 1 – 2 < 2. ANSWER: b 2...
View Full Document

• Fall '10
• Zheng
• Variance, Null hypothesis, Plus and minus signs, independent populations

{[ 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