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A study is conducted to determine if a newly designed text book is more helpful...

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A study is conducted to determine if a newly designed text book is more helpful to learning the material than the old edition The mean score on the final exam for a course using the old edition is 75 Ten randomly selected people who used the new text take the final exam Their scores are shown in the table below Person ABCDEFGHIJ Test Score 85 95 70 69 92 96 81 74 76 89 Use a 0 01 significance level to test the claim that people do better with the new edition Assume the standard deviation is 10 5 Also assume the standardized test statistics has N 0 1 as its distribution a What kind of test should be used OA One Tailed B Two Tailed OC It does not matter b The test statistic is 2 32 c The P value is d Is there sufficient evidence to support the claim that people do better than 75 on this exam OA No rounded to 2 decimals B Yes e Construct a 99 confidence interval for the mean score for students using the new text

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