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[Solved] Given that in a one-tail test you cannot reject Ho, can you reject Ho

Question 1 Given that in a one-tail test you cannot reject Ho, can you reject Ho in a two-tail test at the same a? Answer Yes No Maybe 1 points... [Show More] Question 2 For a sample size of n = 100 and σ = 10, we want to test the hypothesis H0: μ = 100. The sample mean is 103. The test statistic is Answer 1.645 1.960 3.000 0.300 1 points Question 3 Which of the following is incorrect? Answer The level of significance is the probability of making a Type I error Lowering both a and b at once will require higher sample size The probability of rejecting a true null hypothesis increases as n increases When Type I error increases, Type II error must decrease, ceteris paribus 1 points Question 4 In hypothesis testing, Type I error is Answer Set at 5 percent Smaller than or equal to 5 percent The probability of rejecting H0 when H0 is true The probability of rejecting H0 when H1 is true 1 points Question 5 Given a normal distribution with σ = 3, we want to test the hypothesis H0: μ = 20. We find that the sample mean is 21. The test statistic is Answer 1.000 1.645 1.960 Impossible to find without more information 1 points Question 6 The Melodic Kortholt Company will change its current health plan if at least half the employees are dissatisfied with it. A trial sample of 25 employees shows that 16 are dissatisfied. For a right-tailed test, the test statistic would be Answer 1.227 1.375 1.400 1.115 1 points Question 7 A sample of 16 ATM transactions shows a mean transaction time of 67 seconds with a standard deviation of 12 seconds. Find the critical value to test whether the mean transaction time exceeds 60 seconds at a = .01. Answer 2.947 2.602 2.583 2.333 1 points Question 8 As you are crossing a field at the farm, your country cousin Jake assures you "Don't worry about that old bull coming toward us. He's harmless." As you consider Jake's hypothesis, what would be Type I error on your part? Answer You will soon feel the bull's horns You will run away for no good reason Jake will not have any more visits from you 1 points Question 9 Last year, 10 percent of all teenagers purchased a new iPhone. This year, a sample of 260 randomly chosen teenagers showed that 39 had purchased a new iPhone. To test whether the percent has risen, the p-value is approximately Answer .0501 .0314 .0492 .0036 1 points Question 10 Which statement about a is not correct? Answer It is the probability of committing a Type I error It is the test's significance level It is the probability of rejecting a true H0 It is equal to 1-b Given that in a one-tail test you cannot reject Ho, can you reject Ho in a two-tail test at the same a? Answer Yes No Maybe 1 points Question 2 For a sample size of n = 100 and σ = 10, we want to test the hypothesis H0: μ = 100. The sample mean is 103. The test statistic is Answer 1.645 1.960 3.000 0.300 1 points Question 3 Which of the following is incorrect? Answer The level of significance is the probability of making a Type I error Lowering both a and b at once will require higher sample size The probability of rejecting a true null hypothesis increases as n increases When Type I error increases, Type II error must decrease, ceteris paribus 1 points Question 4 In hypothesis testing, Type I error is Answer Set at 5 percent Smaller than or equal to 5 percent The probability of rejecting H0 when H0 is true The probability of rejecting H0 when H1 is true 1 points Question 5 Given a normal distribution with σ = 3, we want to test the hypothesis H0: μ = 20. We find that the sample mean is 21. The test statistic is Answer 1.000 1.645 1.960 Impossible to find without more information 1 points Question 6 The Melodic Kortholt Company will change its current health plan if at least half the employees are dissatisfied with it. A trial sample of 25 employees shows that 16 are dissatisfied. For a right-tailed test, the test statistic would be Answer 1.227 1.375 1.400 1.115 1 points Question 7 A sample of 16 ATM transactions shows a mean transaction time of 67 seconds with a standard deviation of 12 seconds. Find the critical value to test whether the mean transaction time exceeds 60 seconds at a = .01. Answer 2.947 2.602 2.583 2.333 1 points Question 8 As you are crossing a field at the farm, your country cousin Jake assures you "Don't worry about that old bull coming toward us. He's harmless." As you consider Jake's hypothesis, what would be Type I error on your part? Answer You will soon feel the bull's horns You will run away for no good reason Jake will not have any more visits from you 1 points Question 9 Last year, 10 percent of all teenagers purchased a new iPhone. This year, a sample of 260 randomly chosen teenagers showed that 39 had purchased a new iPhone. To test whether the percent has risen, the p-value is approximately Answer .0501 .0314 .0492 .0036 1 points Question 10 Which statement about a is not correct? Answer It is the probability of committing a Type I error It is the test's significance level It is the probability of rejecting a true H0 It is equal to 1-b [Show Less]

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