# Question: a Estimate the population mean with 90 confidence given the

a. Estimate the population mean with 90% confidence given the following: x̄ = 175, s = 30 and n = 5.

b. Repeat part (a) assuming that you know that the population standard deviation is σ = 30.

c. Explain why the interval Estimate produced in part (b) is narrower than that in part (a).

b. Repeat part (a) assuming that you know that the population standard deviation is σ = 30.

c. Explain why the interval Estimate produced in part (b) is narrower than that in part (a).

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