For Problem 8.26, determine the 90 percent confidence interval for estimating the average number of workers per firm in the industry. Problem 8.26 For a sample of 50 firms taken from a particular...

For Problem 8.26, determine the 90 percent confidence interval for estimating the average number of workers per firm in the industry.

Problem 8.26

For a sample of 50 firms taken from a particular industry the mean number of employees per firm is 420.4 with a sample standard deviation of 55.7. There is a total of just 380 firms in this industry.