Simon Fraser University BUEC 232 Final Exam 2015

Jul 2nd, 2016
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Question 1. Ginger root is used by many as a dietary supplement. A manufacturer of supplements produces capsules that are advertised to contain at least 500 mg. of ground ginger root. A consumer advocacy group doubts this claim and tests the hypotheses H0: ? = 500 Ha: ? < 500 based on measuring the amount of ginger root in a SRS of 100 capsules. Suppose the results of the test fail to reject H0 when, in fact, the alternative hypothesis is true. In this case the consumer advocacy group will have a. committed a Type I error. b. committed a Type II error. c. no power to detect a mean of 500. 2. A researcher reports that a test is "significant at 5%." This test will be a. Significant at 1%. b. Not significant at 1%. c. Significant at 10%. 3. Suppose the average Math SAT score for all students taking the exam this year is 480 with standard deviation 100. Assume the distribution of scores is normal. The senator of a particular state notices that the mean score for students in his stat

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Simon Fraser University BUEC 232 Final Exam 2015Report this Question as InappropriateQuestion1. Ginger root is used by many as a dietary supplement. A manufacturer of supplementsproduces capsules that are advertised to contain at least 500 mg. of ground ginger root. Aconsumer advocacy group doubts this claim and tests the hypotheses H0: ? = 500 Ha: ? < 500based on measuring the amount of ginger root in a SRS of 100 capsules. Suppose the results ofthe test fail to reject H0 when, in fact, the alternative hypothesis is true. In this case the consumeradvocacy group will havea. committed a Type I error.b. committed a Type II error.c. no power to detect a mean of 500.2. A researcher reports that a test is "significant at 5%." This test will bea. Significant at 1%.b. Not significant at 1%.c. Significant at 10%.3. Suppose the average Math SAT score for all students taking the exam this year is 480 withstandard deviation 100. Assume the distribution of scores is normal. The senator of a particularstate notices that the mean score for students in his state who took the Math SAT is 500. His staterecently adopted a new mathematics curriculum and he wonders if the improved scores areevidence that the new curriculum has been successful. Since over 10,000 students in his statetook the Math SAT, he can show that the P-value for testing whether the mean score in his stateis more than the national average of 480 is less than 0.0001. We may correctly conclude thata. the

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