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Statistics students believe that the mean score on a first statistics test is 65 The...

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Statistics students believe that the mean score on a first statistics test is 65 The instructor thinks that the mean score is higher She samples 10 statistics students and obtains the scores Grades 64 3 62 7 83 2 88 61 9 96 64 3 74 4 69 65 Test grades are believed to be normally distributed Use a significance level of a 5 critical value to to 05 1 8331 A State the alternative hypothesis HA O 65 O 65 O 65

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