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4. Scores of 10 randomly selected exams in a statistic class are given below: 98 78 90 70 80 55 78 77 70 80 (a) (4 points) Fi
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Answer #1

(a)

77.600 mean Data
11.587 std. dev.

(b) The hypothesis being tested is:

H0: µ = 75

Ha: µ > 75

(c) C.T.S = 0.710

p-value = 0.2480

(d) We cannot conclude that the mean score of all statistics exams is greater than 75.

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