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TB MC Qu. 9-117 In a right-tailed test, a statistician got a ... In a right-tailed test, a statistician got a z test statistic of 1.47. What is the p-value? Multiple Choice O .4292 0708 O .0874 O .9292TB TF Qu. 9-58 If the lower tail area for a ... If the lower tail area for a two-tailed test is .023, then the p-value = .023. True or False True FalseTB MC Ou. 9-65 John rejected his null hypothesis in a John rejected his null hypothesis in a right-tailed test for a mean at a : .025 because his critical [value was 2.000 and his calculated [value was 2.345. We can be sure that Multiple Choice 0 John did not commit a Type I error. 0 John did not commitaType || error. 0 John committed neither a Type I nor Type II error. 0 John committed both a Type | and a Type II error. TB MC Qu. 9-88 For a sample size of For a sample size of n =100, and 0: 10, we want to test the hypothesis H0: ,u =100. The sample mean is 103. The test statistic is Multiple Choice 1.645. 1.960. 0.300. O O O 0.000. O TB TF Qu. 9-21 For a sample of nine items, the critical ... For a sample of nine items, the critical value of Student's t for a left-tailed test of a mean at a = .05 is -1.860. True or False True FalseTB MC Qu. 9-90 Given a normal distribution with Given a normal distribution with o: 3, we want to test the hypothesis H0: ,u 2 20. We find that the sample mean is 21. The test statistic is Multiple Choice 0 1.000. 1.645. impossible to find without more information. O O 1.960. O TB MC Qu. 9-79 For a right-tailed test of a hypothesis for ... For a right-tailed test of a hypothesis for a population mean with n = 14, the value of the test statistic was t= 1.863. The p-value is Multiple Choice O between .05 and .025. O between .10 and .05. O greater than .10. O less than .01.TB TF Qu. 9-20 For a given level of significance, the ... For a given level of significance, the critical value of Student's t increases as n increases. True or False True FalseTB MC Ou. 9-76 Guidelines for the Jolly Blue Giant Health Guidelines for the Jolly Blue Giant Health Insurance Company say that the average hospitalization for a triple hernia operation should not exceed 30 hours, A diligent auditor studied records of16 randomly chosen triple hernia operations at Hackmore Hospital and found a mean hospital stay of 40 hours with a standard deviation of 20 hours. "Aha!" she cried, "the average stay exceeds the guideline." At a 2 .025, the critical value for a right-tailed test of her hypothesis is Multiple Choice 0 1.753 2.131 1.960 O O 1.645 O TB MC Qu. 9-74 Which is not true of ... Which is not true of p-values? Multiple Choice O When p-values are small, we tend to reject Ho. O P-values measure the probability of an incorrect decision. O P-values allow you to make a decision without knowing if the test is one- or two-tailed. O P-values do not require a to be specified a priori.TB TF Qu. 9-18 A two-tailed hypothesis test for ... A two-tailed hypothesis test for Ho: M = 15 at a = .10 is analogous to asking if a 90 percent confidence interval for / contains 15. True or False True FalseTB MC Qu. 9-118 In a left-tailed test, a statistician got a ... In a left-tailed test, a statistician got a z test statistic of -1.720. What is the p-value? Multiple Choice O 4292 O .0709 O .0427 O 0301TB MC Qu. 9-99 A sample of 16 ATM transactions shows a mean ... A sample of 16 ATM transactions shows a mean transaction time of 67 seconds with a standard deviation of 12 seconds. State the hypotheses to test whether the mean transaction time exceeds 60 seconds. Multiple Choice O Ho: us 60, H1: u > 60 O Ho: M 2 60, H1: M 100, then the test is right-tailed. TB MC Qu. 9-84 Dullco Manufacturing claims that its alkaline Dullco Manufacturing claims that its alkaline batteries last at least 40 hours on average in a certain type of portable CD player. But tests on a random sample of18 batteries from a day's large production run showed a mean battery life of 37.8 hours with a standard deviation of 5.4 hours. To test DullCo's hypothesis, the test statistic is Multiple Choice 0 71.980 O 71.728 O 72.101 O 1.960 TB TF Qu. 9-16 A hypothesis test may be statistically ... A hypothesis test may be statistically significant, yet have little practical importance. True or False True FalseTB MC Qu. 9-110 In a test of a mean, the reported In a test of a mean, the reported pvalue is .025. Using a :05 the conclusion would be to Multiple Choice 0 accept the null hypothesis. 0 reject the null hypothesis. O fail to reject the null hypothesis. gather more evidence due to inconclusive results. TB MC Qu. 9-147 In a left-tailed test, a statistician got a ... In a left-tailed test, a statistician got a z test statistic of -1.61. What is the p-value? Multiple Choice O .4292 O 0709 O 0537 O 0301