Question: A sample of size n = 15 has sample mean x = 2.1 and sample standard deviation s = 1.7. a. Construct a 95% confidence

A sample of size n = 15 has sample mean ̄x = 2.1 and sample standard deviation s = 1.7.

a. Construct a 95% confidence interval for the population mean σ.

b. If the sample size were n = 25, would the confidence interval be narrower or wider?

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