Question: A sample of 28 data observations has a sample mean x = 0.0328. If an experimenter wishes to use a known value a = 0.015

A sample of 28 data observations has a sample mean x = 0.0328. If an experimenter wishes to use a "known" value a = 0.015 for the population standard deviation, construct an appropriate 95% two-sided confidence interval for the population mean

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