# Question

Review the results of Exercise 10.43. Describe what happens to the sample size when

a. The population standard deviation decreases.

b. The confidence level decreases.

c. The bound on the error of estimation decreases.

a. The population standard deviation decreases.

b. The confidence level decreases.

c. The bound on the error of estimation decreases.

## Answer to relevant Questions

a. Determine the sample size necessary to estimate a population mean to within 1 with 90% confidence given that the population standard deviation is 10.b. Suppose that the sample mean was calculated as 150. Estimate the ...Review Exercises 10.48 and 10.49. Describe what happens to the confidence interval estimate whena. The standard deviation is equal to the value used to determine the sample size.b. The standard deviation is smaller than the ...a. From the information given here determine the 95% confidence interval estimate of the population mean.x̄ = 100 σ = 20 n = 25b. Repeat part (a) with x = 200.c. Repeat part (a) with x = 500.d. Describe what happens to the ...H0: µ = 15H1: µ < 15σ = 2, n = 25, x̄ = 14.3, α = .10Calculate the value of the test statistic, set up the rejection region, determine the p-value, interpret the result, and draw the sampling distribution.For each of Exercises 11.48–11.50, draw the sampling distributions similar toFigure.Post your question

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