# Question: Assume a normal distribution with known population variance Calculate the

Assume a normal distribution with known population variance. Calculate the width to estimate the population mean, m, for the following.

a. 90% confidence level; n = 100; σ2 = 169

b. 95% confidence level; n = 120; σ = 25

a. 90% confidence level; n = 100; σ2 = 169

b. 95% confidence level; n = 120; σ = 25

## Answer to relevant Questions

Assume a normal distribution with known population variance. Calculate the LCL and UCL for each of the following. a. x-bar = 50; n = 64; σ = 40; α = 0.05 b. x-bar = 85; n = 225; σ2 = 400; α = 0.01 c. x-bar = 510; n = ...Find the standard error to estimate the population mean for each of the following. a. n = 17; 95% confidence level; s = 16 b. n = 25; 90% confidence level; s2 = 43 In Example 7.5 we calculated a 95% confidence interval estimate of the Healthy Eating Index-2005 score for a random sample of participants at the time of their first interview. Recall that there are two observations for each ...Find the margin of error to estimate the population proportion for each of the following. a. n = 350; p` = 0.30; α = 0.01 b. n = 275; p` = 0.45; α = 0.05 c. n = 500; p` = 0.05; α = 0.10 In a presidential election year, candidates want to know how voters in various parts of the country will vote. Suppose that 1 month before the election a random sample of 540 registered voters from one geographic region is ...Post your question