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# 13 9-0?! 14 9-0?! 15 9-0?

Question 9-15 are based on the random sample below which is obtained to test the following hypothesis about the population mean.

80 83 70 71 80 77 75 78

86 87 77 88 88 83 83 77

71 77 78 85 82 87 78 79

85 85 90 75 75 83 82 80

76 87 75 83 72 75 75 82

73 79 74 80 81 88 79 83

83 89 74 87 85 97 79 83

79 84 81 84 94 75 89 78

90 68 80 88 77 81 87 79

73 79 83 77 83 83 85 79

82 80 83 71 79 88 81 90

73 80 73 84 82 83 75 81

82 82 80 76 80 84 80 85

13 9-0?!» 14 9-0?!» 15 9-0?!» Given a = 0.05, the critical value for the testis,
2.363
1.983
1.660
1.290 The approximate p-value for the testis,
0.072
0.063
0.038
0.023 Based on the p-value in the previous question, Do not reject H0 at o = 0.10; do not reject H0 at o = 0.05
Reject H0 at o = 0.10; reject H0 at o = 0.05 Reject H0 at o = 0.10; do not reject H0 at o = 0.05 Do not reject H0 at o = 0.10; reject H0 at o = 0.05
Decision rule: Reject Ho ifp-value is &lt; o

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