08InferentialStatsAssignment

# 08InferentialStatsAssignment - INFERENTIAL STATISTICS...

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INFERENTIAL STATISTICS ASSIGNMENT _______________________________________ NAME 1. A chi-square analysis yields a calculated value of 15.31. There are 6 degrees of freedom and a significance level of .05. What can you conclude? (2 pts.) _________________________________________________________________________ _________________________________________________________________________ 2. A chi-square analysis yields a calculated value of 9.48. There are 4 degrees of freedom and a significance level of .05. What can you conclude? (2 pts.) _________________________________________________________________________ _________________________________________________________________________ 3. How do you calculate degrees of freedom for a chi-square test with two variables and two levels of each variable? (2 pts.) (Hint: Use your textbook to find the answer.) _____________________________ With two variables and three levels of each variables? (2 pts.) ______________________________ 4. An instructor has 10 students in Section 1 and 8 students in Section 2. Both sections took the same test. Section 1 had a mean of 81. Section 2 had a mean of 74. A t-test yielded a t value of 2.10. The instructor refused to treat the sections differently, claiming they were statistically the same. You are a student in Section 2. Construct an argument to convince the instructor she made an "error" and that she should treat the classes differently. Note: df for the t-test is n-2. (7 pts.) _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________

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