You may need to use the appropriate appendix table or technology to answer this question. 25 days of operation shows a sample mean of 300 rooms occupied per day and a sample standard 30 deviation (a) What is the point estimate of the population variance? (b) Provide a 90% confidence interval estimate of the population variance. (Round your answers to the nearest integer.) to (c) Provide a 90% confidence interval estimate of the population standard deviation. (Round your answers to one decimal place.) to