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

1. 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 da y spend 90 minutes working with t he computer program. At the end of the school year the teacher compares test scores for two classes.
2. A researcher examines how light intensity influences color perception. A sample of 50 college students is obtained and e ach student is asked to judge t he differences between color patches under conditions of bright light and dim lights.
3. A research study compares problem solving ability for participants with two different levels of self-esteem - high self esteem and low self-esteem.

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