12.4 Test 2 Computer Practice

12.4 Test 2 Computer Practice - 144 Between’Gr 332.03333...

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Twenty students were randomly selected for each test and their test grades were recorded (out of 150). Can you conclude there is a difference in average test score among the three tests at the 10% significance T1 T2 T3 112 105 146 118 119 71 136 132 143 127 115 129 100 103 142 Answer: 135 120 101 143 110 97 Anova: Single Factor 142 131 116 80 134 126 SUMMARY 112 113 120 Groups Count Sum 131 120 72 T1 20 2399 136 133 104 T2 20 2304 110 85 121 T3 20 2408 94 118 119 128 108 143 136 140 121 ANOVA 80 138 146 Source of Variat SS df 134 67 144 Between Gr
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Unformatted text preview: 144 Between’Gr 332.03333 2 119 105 120 Within’Grou 22616.95 57 126 108 127 Total 22948.983 59 Ho’:’mu1’=’mu2’=’mu3 Ha:’at’least’one’mu’differs Average Variance F’=’.418 119.95 367.41842 pval’=’.660 115.2 322.8 There’is’not’enough’evidence’to’conclude 120.4 500.14737 there’is’a’difference’in’avg’test’score among’the’three’tests. MS F P-value F crit 166.01667 0.4184008 0.6601031 2.3981573 396.7886...
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