# Question

Consider again the problem of estimating the mean age, μ, of all people in the civilian labor force.

In Example 8.7 on page 322, we found that a sample size of 2250 is required to have a margin of error of 0.5 year and a 95% confidence level. Suppose that, due to financial constraints, the largest sample size possible is 900. Determine the smallest margin of error, given that the confidence level is to be kept at 95%. Recall that σ = 12.1 years.

In Example 8.7 on page 322, we found that a sample size of 2250 is required to have a margin of error of 0.5 year and a 95% confidence level. Suppose that, due to financial constraints, the largest sample size possible is 900. Determine the smallest margin of error, given that the confidence level is to be kept at 95%. Recall that σ = 12.1 years.

## Answer to relevant Questions

Consider again the problem of estimating the mean age, μ, of all people in the civilian labor force. In Example 8.7 on page 322, we found that a sample size of 2250 is required to have a margin of error of 0.5 year and a ...For a fixed confidence level, show that (approximately) quadrupling the sample size is necessary to halve the margin of error. (Hint: Use Formula 8.1 on page 321.) For a t-curve with df = 17, use Table IV to find each t-value. a. t0.05 b. t0.025 c. t0.005 x-bar = 35, n = 25, s = 4, confidence level = 90% We have provided a sample mean, sample size, sample standard deviation, and confidence level. In each case, use the one-mean t-interval procedure to find a confidence ...In the article "Distribution of Oxygen in Surface Sediments from Central Sagami Bay, Japan: In Situ Measurements by Microelectrodes and Planar Optodes" (Deep Sea Research Part I: Oceanographic Research Papers, Vol. 52, Issue ...Post your question

0