Question: Why the answer is E? At a computer manufacturing company, the actual size of computer chips is normally distributed with a mean of 1 cm

Why the answer is E?

At a computer manufacturing company, the actual size of computer chips is normally

distributed with a mean of 1 cm and standard deviation of 0.1 cm. A random sample of

12 computer chips is taken. Above what value do 2.5% of the sample means fall?

A. 1.051

B. 1.960

C. 1.645

D. 1.053

E. 1.057

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