Attitudes toward school. The Survey of Study Habits and
Chapter , Problem 6.71(choose chapter or problem)
Attitudes toward school. The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the motivation, attitude toward school, and study habits of students. Scores range from 0 to 200. The mean score for U.S. college students is about 115, and the standard deviation is about 30. A teacher who suspects that older students have better attitudes toward school gives the SSHA to 25 students who are at least 30 years of age. Their mean score is x 127.8. (a) Assuming that s 30 for the population of older students, carry out a test of H0: m 115 Ha: m 115 Report the P-value of your test, and state your conclusion clearly. (b) Your test in part (a) required two important assumptions in addition to the assumption that the value of s is known. What are they? Which of these assumptions is most important to the validity of your conclusion in part (a)? 6.
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