Question: For the following studies indicate whether or not a repeated measures t test is the appropriate analysis and explain the answers:

A. A teacher is evaluating the effectiveness of a new computer training program for 3rd. grade math. One 3rd. grade math gets a regular math teacher for 90 minutes a day. A second class gets regular instruction 4 days each week, but on the 5th day spend 90 minutes working with the computer program. At the end of the school year the teacher compares test scores for two classes.

B. A researcher examines how light intensity influences color perception. A sample of 50 college students is obtained and each student is asked to judge the differences between color patches under conditions of bright light and dim lights.

C. A research study compares problem solving ability for participants with two different levels of self-esteem - high self esteem and low self-esteem.