Q2 The diameter of a certain type of ball bearing is normally distribut and a standard deviation of Imm. If a random sample of 10 ball bearings is selected from the production line, (a) Determine the mean and standard deviation of sampling ditribution of X.

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A: Consider the following:

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A: Use the substitution and solve the integral easily.

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A: We will find the value of x

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A: B + A = 18

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A:

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A: Solution:-