Two-sample t-tests

Week 3: September 8 & 10

MATH 417/GSR 517 ~ Statistical Applications ~ Fall 2003

Class meeting schedule and topics

Monday, September 8 ~	Two-sample t-tests
Wednesday, September 10 ~	Assumptions and transformations
Monday, September 15 ~	One-way Analysis of Variance

Homework Assignments

3. Due Monday, September 8

   Required work

   • Review Chatper 3 on "A Closer Look at Assumptions"
   • Collect 30 pairs of observations from the Anderson-Cook and Dorai-Raj applet (http://www.amstat.org/publications/jse/java/v9n1/anderson-cook/GoodExpDesignApplet.html).

     Write up a matched pairs t-test to explore the hypothesis that the mean response time for the dominant hand is equal to the mean response time for the non-dominant hand.

4. Due Wednesday, September 10

   Required work

   • Review Chapter 4 on "Alternatives to the t-Tools"

   • If the first letter of your last name is "G," "K," or "S" please prepare a solution to Data Problem 21 on page 52.
     If the first letter of your last name is "J," "N," or "W" please prepare a solution to Data Problem 22 on page 53.
     If the first letter of your last name is anything else, please prepare a solution to Data Problem 23 on page 53.

   Optional work

   • Conceptual Exercises 1 through 11 on pages 50 and 51
   • Any of the other Data Problems selected from 21, 22, and 23 on pages 52 and 53

5. Due Monday, September 15

   Required work

   • Read Chapter 5 on "Comparisons Among Several Samples"

   • If the first letter of your last name is "G," "K," or "S" please prepare a solution to Data Problem 31 on pages 81 and 82.
     If the first letter of your last name is "J," "N," or "W" please prepare a solution to Data Problem 32 on page 82.
     If the first letter of your last name is anything else, please prepare a solution to Data Problem 33 on page 82.

   • On a separate sheet of paper, write your answers to the following questions:

     If you were going to perform a study of the effectiveness of chapped lip treatments,

     1. Where would you go to find subjects to be in the study?
     2. What variable(s) would you measure to determine if a chapped lip treatment is effective or not?

   Optional work

   • Conceptual Exercises 1 through 19 on pages 75 through 77
   • Computational Exercise 30 on pages 80
   • Any of the other Data Problems selected from 31, 32, and 33 on pages 81 and 82