In U.S. hospitals, the average length of stay (LOS) for a diagnosis of pneumonia is 137 hours with a standard deviation of 25 hours. The LOS (in hours) for a sample of 12 pneumonia patients at Santa...

In U.S. hospitals, the average length of stay (LOS) for a diagnosis of pneumonia is 137 hours with a standard deviation of 25 hours. The LOS (in hours) for a sample of 12 pneumonia patients at Santa Theresa Memorial Hospital is shown below. In a two-tailed test at α = .05, is this sample variance consistent with the national norms? Show all steps, including the hypotheses and critical values from Appendix E. Hint: Ignore the mean. (See National Center for Health Statistics, Advance Data from Vital and Health Statistics, no. 332 [April 9, 2003], p. 13.)