# Question

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).

## Answer to relevant Questions

a. After sampling 1,000 members of a normal population, you find x̄ = 15,500 and s = 9,950. Estimate the population mean with 90% confidence.b. Repeat part (a) assuming that you know that the population standard deviation ...a. Test the following hypotheses with α = .05 given that x̄ = 405, s = 100, and n = 1,000.H0: µ = 400H1: µ > 400b. Repeat part (a) assuming that you know that the population standard deviation is σ = 100.c. Explain why ...OfficeMax, a chain that sells a wide variety of office equipment often features sales of products whose prices are reduced because of rebates. Some rebates are so large that the effective price becomes $0. The goal is to ...Estimate with 95% confidence the mean income (INCOME) of Americans in 2012.Estimate with 95% confidence the average amount of television watched per day (TVHOURS).Post your question

0