True or False: A sample is used to obtain a 95% confidence interval for the mean of a population. The confidence interval goes from 15 to 19. If the same sample had been used to test the null hypothesis that the mean of the population is equal to 18 versus the alternative hypothesis that themean of the population differs from 18, the null hypothesis could be rejected at a level of significance of 0.05.ANSWER:FalseTYPE: TF DIFFICULTY: Moderate KEYWORDS: confidence interval, two-tailed test, decision1.True or False: A sample is used to obtain a 95% confidence interval for the mean of a population. The confidence interval goes from 15 to 19. If the same sample had been used to test the null hypothesis that the mean of the population is equal to 20 versus the alternative hypothesis that themean of the population differs from 20, the null hypothesis could be rejected at a level of significance of 0.10.ANSWER:TrueTYPE: TF DIFFICULTY: Moderate KEYWORDS: confidence interval, two-tailed test, decision

1.True or False: A sample is used to obtain a 95% confidence interval for the mean of a population. The confidence interval goes from 15 to 19. If the same sample had been used to test the null hypothesis that the mean of the population is equal to 20 versus the alternative hypothesis that themean of the population differs from 20, the null hypothesis could be rejected at a level of significance of 0.02.ANSWER:FalseTYPE: TF DIFFICULTY: ModerateEXPLANATION: We are not sure if 20 will be in the wider confidence interval.KEYWORDS: confidence interval, two-tailed test, decision1.True or False: A sample is used to obtain a 95% confidence interval for the mean of a population. The confidence interval goes from 15 to 19. If the same sample had been used to test the null hypothesis that the mean of the population is equal to 20 versus the alternative hypothesis that themean of the population differs from 20, the null hypothesis could be accepted at a level of significance of 0.02.ANSWER:FalseTYPE: TF DIFFICULTY: ModerateEXPLANATION: We are not sure if 20 will be in the wider confidence interval. KEYWORDS: confidence interval, two-tailed test, decision

TABLE 9-2A student claims that he can correctly identify whether a person is a business major or an agriculture major by the way the person dresses. Suppose in actuality that if someone is a business major, he can correctly identify that person as a business major 87% of the time. When a person is an agriculture major,the student will incorrectly identify that person as a business major 16% of the time. Presented with one person and asked to identify the major of this person (who is either a business or agriculture major), he considers this to be a hypothesis test with the null hypothesis being that the person is a business major andthe alternative that the person is an agriculture major.1.Referring to Table 9-2, what would be a Type I error?