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114 115 10 The critical value for a 5 percent level of significance is: 116 1.537 1 17 1.660 118 1.793 119 1.936 120 121 11 The p-value for the test is approximately, 122 0.048 123 0.058 124 0.071 125 0.087 126 127 The test leads you to: 128 Do not reject Ho at a 5 percent, but reject Ho at a 10 percent level of significance. 129 Do not reject Ho at a 5 percent, and do not reject Ho at a 10 percent level of significance. 130 Reject Ho at a 5 percent, and reject Ho at a 10 percent level of significance. 131 d Reject Ho at a 5 percent, but do not reject Ho at a 10 percent level of significance.81 Questions 8-12 are related to the following: 82 Consider the following hypothesis test 83 84 Ho: us 120 85 Hit u > 120 86 87 8 This test is: 88 a An open-interval test. 89 A two-tail test 90 C A lower-tail test. 91 An upper-tail test. 92 93 The following random sample is selected to perform the test of hypothesis 94 95 103 103 114 121 132 71 121 147 96 151 110 143 164 82 136 98 84 97 119 112 76 121 114 143 127 118 98 152 176 123 139 122 159 96 100 99 176 93 100 137 158 146 88 143 100 129 136 89 117 96 120 124 175 101 119 97 144 113 106 115 130 141 102 130 89 151 101 119 100 123 147 103 107 184 149 124 103 147 125 91 104 125 150 107 133 142 139 137 105 105 112 123 161 102 145 157 147 31 106 172 130 121 141 136 84 78 149 107 103 108 104 99 189 107 120 174 108 109 9 The test statistic is (if negative, use the absolute value], 110 1.788 111 1.625 112 1.478 113 1.34357 5 You are asked to perform a hypothesis test that population mean is at least, or no less than, 58 80. Which of the following is the correct statement of the null and alternative hypotheses for 59 this test? 60 Hi: p 80 Ho: HS 80 62 Ho: H 2 80 Hi:p 80 64 65 6 You are asked to perform a hypothesis test that population proportion is at most, or no 66 greater than, 0.75. Which of the following is the correct statement of the null and alternative 67 hypotheses for this test? 68 Ho: 1 2 0.75 H1: n 0.75 70 Ho: It > 0.75 H1: T S 0.75 71 Ho: It 0.5528 Note: 29 If your answer does not exactly match the correct choice, it is due to rounding of intermediate 30 calculations. To avoid the discrepancy, do your calculations in Excel without rounding. 31 32 1 Which of the following statements about Type I and Type II errors is correct: 33 a Type I: Reject a true alternative hypothesis. Type II: Do not reject a false alternative. 34 b Type I: Reject a true null hypothesis. Type II: Do not reject a false null hypothesis. 35 Type I: Reject a false null hypothesis. Type II: Reject a true null hypothesis. 36 d Type I: Do not reject a false null hypothesis. Type II: Reject a true null hypothesis. 37 38 2 In a test of hypothesis, the symbol a represents: 39 The power of the test, or the probability of rejecting a false Ho. 40 The level of significance, or the probability of not rejecting a false Ho. 41 The level of significance, or the probability of committing a Type II error. 42 The level of significance, or the probability of rejecting a true Ho- 43 44 3 Suppose in a test of hypothesis the probability value (p-value) is 0.0768. Then you should, 45 reject Ho at a = 0.10, but not reject Ho at a = 0.05. 46 reject Ho at a = 0.05, but not reject Ho at a = 0.10. 47 not reject Ho at a = 0.10. 48 reject Ho at a = 0.05. 49 50 4 You are asked to perform a hypothesis test that population mean is less than 100. Which of 51 the following is the correct statement of the null and alternative hypotheses for this test? 52 Ho: us 100 Hitu > 100 53 Ho: H 2 100 Hit u 100 Hit us 100 55 Ho: p