{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# 10_14_09 - STAT 409 Fall 2009 Examples for Matched Pair...

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

STAT 409 Examples for 10/14/2009 Fall 2009 Matched Pair Comparison: Pair Difference 1 X 1 Y 1 D 1 = X 1 – Y 1 2 X 2 Y 2 D 2 = X 2 – Y 2 n X n Y n D n = X n – Y n Assume that the differences D i = X i – Y i are a random sample from normal distribution with mean δ and standard deviation σ D . To test the hypothesis H 0 : δ = δ 0 , use the test statistic n s t D 0 D δ - = . n – 1 degrees of freedom 1. Dr. Statman claims that his new revolutionary diet-and-exercise plan allows participants to lose, on average, one pound per day (i.e., 7 pounds per week). Eight participants were weighed in the beginning of the program, and then again a week later. The results were as follows: Participant 1 2 3 4 5 6 7 8 Weight Before 213 222 232 201 230 188 218 182 Weight After 207 220 224 198 219 183 220 175 Pounds Lost 6 2 8 3 11 5 2 7 Recall that D = 5 pounds, and s D = 4 pounds. Is there enough evidence to conclude that the average weight loss is less that 7 pounds per week? (Use α = 0.05.) The t Distribution r t 0.40 t 0.25 t 0.20 t 0.15 t 0.10

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