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C) Explain how we know that the average of a sample of 15 randomly selected gallons of paint is normally distributed. D) What is the

C) Explain how we know that the average of a sample of 15 randomly selected gallons of paint is normally distributed. D) What is the probability that for a sample of 15 randomly selected gallons of paint the average number of square feet of coverage is 400 square feet or more? P (X > 400) =

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