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b) (4 pts) Suppose that the diameters of Megalopizzas are normally distributed with a mean of 18.75 inches and a standard deviation of 0.25 inches.
b) (4 pts) Suppose that the diameters of Megalopizzas are normally distributed with a mean of 18.75 inches and a standard deviation of 0.25 inches. If Clark samples 4 pizzas, what is the probability that the average size of the four pizzas is greater than 19 inches
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