Because of staffing decisions, managers of the Gibson-Marimont Hotel are interested in the variability in the number of rooms occupied per day during a particular season of the year. A sample of 20 days of operation shows a sample mean of 281 rooms occupied per day and a sample standard deviation of 25 rooms.
What is the point estimate of the population variance?
Provide a 90% confidence interval estimate of the population variance (to 1 decimal).
Provide a 90% confidence interval estimate of the population standard deviation (to 1 decimal).