1 Suppose in a test of hypothesis the probability value (p-value) is 0.0725. Then you should,

a reject H at = 0.10, but not reject H at = 0.05.

b reject H at = 0.05, but not reject H at = 0.10.

c not reject H at = 0.10.

d reject H at = 0.05.

2 You are asked to perform a hypothesis test that population mean is greater than 80. Which of the following is the correct statement of the null and alternative hypotheses for this test?

a H: > 80 H: 80

b H: 80 H: < 80

c H: 80 H: > 80

d H: 80 H: > 80

3 You are asked to perform a hypothesis test that population mean is at most, or no greater than, 65. Which of the following is the correct statement of the null and alternative hypotheses for this test?

a H: < 65 H: 65

b H: 65 H: < 65

c H: 65 H: > 65

d H: > 65 H: 65

4 You are asked to perform a hypothesis test that population proportion is at least, or no less than, 0.65. Which of the following is the correct statement of the null and alternative hypotheses for this test?

a H: 0.65 H: < 0.65

b H: 0.65 H: > 0.65

c H: > 0.65 H: 0.65

d H: < 0.65 H: 0.65

5 You are asked to perform a hypothesis test that population proportion is different from 0.35. Which of the following is the correct statement of the null and alternative hypotheses for this test?

a H: 0.35 H: = 0.35

b H: = 0.35 H: 0.35

c H: 0.35 H: < 0.35

d H: 0.35 H: > 0.35

6 Which of the following statements about Type I and Type II errors is correct:

A Type I: Reject a true alternative hypothesis. Type II: Do not reject a false alternative.

B Type I: Reject a false null hypothesis. Type II: Reject a true null hypothesis.

C Type I: Reject a true null hypothesis. Type II: Do not reject a false null hypothesis.

D Type I: Do not reject a false null hypothesis. Type II: Reject a true null hypothesis.

7 In a test of hypothesis, the symbol represents:

A The power of the test, or the probability of rejecting a false H.

B The level of significance, or the probability of not rejecting a false H.

C The level of significance, or the probability of committing a Type II error.

D The level of significance, or the probability of rejecting a true H.

Questions 8-12 are related to the following:

Consider the following hypothesis test.

H: 120

H: < 120

8 This test is:

a A lower-tail test.

b An upper-tail test.

c A two-tail test.

d A closed-interval test.

You obtain the following random sample to test the hypothesis in the previous question.

154 118 94 102 157 113 124 115 140

105 125 103 87 95 105 134 133 137

169 135 125 100 130 127 144 122 128

63 101 80 153 82 166 156 101 123

118 133 133 144 114 121 122 133 110

110 134 130 120 79 120 98 173 66

129 116 99 99 92 107 129 75 109

104 148 140 138 119 121 90 131 55

143 92 109 98 159 138 129 169 95

92 118 151 138 120 148 110 103 130

114 58 138 135 92 117 114 123 94

124 108 132 118 121 104 155 89 96

106 123 116 123 85 95 97 96 95

111 136 103 88 109 122 103 128 162

98 97 152 131 72 141 130 128 116

92 123 146 135 114 116 104 97 120

93 70 77 90 131 91 137 85 144

9 The test statistic is, |TS| = _______

a 2.004

b 1.890

c 1.783

d 1.682

10 The critical value for a 5 percent level of significance is:

a 1.655

b 1.761

c 1.873

d 1.993

11 The p-value for the test is,

a 0.0982

b 0.0546

c 0.0303

d 0.0168

12 The test leads you to:

a Reject H at a 10 percent, but do not reject H at a 5 percent level of significance.

b Reject H at a 10 percent, and reject H at a 5 percent level of significance.

c Do not reject H at a 10 percent level of significance.

d Do not reject H at a 5 percent level of significanc