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(20) 12. Suppose that the mean of a sample of mound-shaped data is 40 and the standard deviation is 4. (4) a. What would the
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12. X~N(40,4) 1:40, 8=4 a) X= M+1.50 = 40 +115 (4) = 46 2= x-M 50-40 - 2.5 4 Z : 36-40 = -1 4 22 = 48-40 = 2 4 > Using 68-95-

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