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A random sample of=256is drawn from a population with a known standard deviation of=3.0 The sample mean is=47.9 What is the 95% confidence interval for

A random sample of=256is drawn from a population with a known standard deviation of=3.0 The sample mean is=47.9

What is the 95% confidence interval for the population mean?

a. (47.37, 48.43)

b. (47.53, 48.27)

c. 47.42, 48.38)

d. (47.28, 48.52)

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