# Question: Suppose a 95 confidence interval for the mean salary of

Suppose a 95% confidence interval for the mean salary of college graduates in a town in Mississippi is given by [$36,080, $43,920]. The population standard deviation used for the analysis is known to be $12,000.

a. What is the point estimator of the mean salary of all college graduates in this town?

b. Determine the sample size used for the analysis.

a. What is the point estimator of the mean salary of all college graduates in this town?

b. Determine the sample size used for the analysis.

**View Solution:**## Answer to relevant Questions

A manager is interested in estimating the mean time (in minutes) required to complete a job. His assistant uses a sample of 100 observations to report the confidence interval as [14.355, 17.645]. The population standard ...We use the t distribution for the statistical inference of the population mean when the underlying population standard deviation is not known. Under the assumption that the population is normally distributed, find tα/2,df ...The manager of The Cheesecake Factory in Boston reports that on six randomly selected weekdays, the number of customers served was 120, 130, 100, 205, 185, and 220. She believes that the number of customers served on ...Suppose the 90% confidence interval for the mean SAT scores of applicants at a business college is given by [1690,1810]. This confidence interval uses the sample mean and the sample standard deviation based on 25 ...Assume =1 0.6 in a sample of size n = 50.a. Construct the 95% confidence interval for the population proportion.b. What happens to the margin of error if the above sample proportion is based on n = 200 instead of n = 50?Post your question