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986 1222 831 728 549 744 945 1450 The state test scores for 12 randomly selected high school seniors are shown on the right. Complete

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986 1222 831 728 549 744 945 1450 The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed. (=) Find the sample mean. x= (Round to one decimal place as needed.)

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