Refer to Exercise 46. Suppose the distribution of diameter is normal. a. Calculate P(11.99 X 12.01) when

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Refer to Exercise  46.

Suppose the distribution of diameter is normal.

a. Calculate P(11.99 X 12.01) when n = 16.

b. How likely is it that the sample mean diameter exceeds 12.01 when n = 25?

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