LO6 Consider the large hospital that wants to estimate the average length of stay of its patients, m. The hospital randomly samples n = 100 of its patients and finds that the sample mean length of stay is x = 4.5 days. Also, suppose it is known that the standard deviation of the length of stay for all hospital patients is s = 4 days. Use the interval LO6 estimator x { 1.96sx to calculate a confidence interval for the target parameter, m.