practicefinal - STA 2023, SECTION 1080 FINAL EXAM NAME:

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Unformatted text preview: STA 2023, SECTION 1080 FINAL EXAM NAME: __________________________________ SHOW YOUR WORK AND REASONING ON ALL PROBLEMS 1. A VVIQ (Vividness of Visual Imagery Questionnaire) is used to assess visual imagery skills. The average score over the general population is 67. A researcher tried to determine whether athletes have a lower average VVIQ level. She administered this test to 50 varsity athletes. (a). Define the parameter of interest in words. (2 pts.) (b). State the null and alternative hypotheses in terms of this parameter. (3 pts.) (c). For the sample of 50 athletes, the mean VVIQ score was 65.6 and the sample standard deviation was 18.2. Write the formula and find the numerical value of the test statistic that is appropriate for this problem. (6 pts.) 1 (d). Find the p- value of this test. (6 pts.) (e) If 05 . = , state the proper conclusion of this test of significance. (3 pts.) 2. (a) Give an example of two disjoint events. (2 pts.) (b) Give an example of two independent events. (2 pts.) 2 3. The American Heart Association claims that only 12% of adult males in the U.S. could pass the Presidents Physical Fitness minimu m requirements. If we selected a random sample of 6 adult U.S. males, what is the probability that exactly 3 of the 6 could pass these minimum requirements? (Assume independence between individual results.) (8 pts.) 4. Declare each statement as true (T) or false (F) (2 pts. each) _______ (a) p- value is the probability compute d under H o of getting a test statistic value as or more extreme (in the direction of H a ) that what was actually observed.observed....
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practicefinal - STA 2023, SECTION 1080 FINAL EXAM NAME:

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