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2. Last year the average grade on the inference test was 82. A random sample of...
2. Last year the average grade on the inference test was 82. A
random sample of this year’s student scores on the same test
produced the results below. Test at the .02 significance level to
see whether the scores have increased significantly from last
year?
83 87 98 92 91 100 88 89 93 81 94 96
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