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8.4 Sampling Distribution of Means and the Central Limit Theorem 8.5 The numbers of incorrect
answers on a true-false competency test for a random sample of 15 students were recorded as
follows: 2 , 1 , 3 , 0 , 1 , 3 , 6 , 0 , 3 , 3 , 5 , 2 , 1 , 4 , and 2 . Find (a) the mean:(2.4) (b) the
median:(2) (c) the mode.(3)

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