The management of Regional Hospital has made substantial improvements in their hospital and would like to test and determine whether there has been a significant decrease in the average length of stay of their patients in their hospital. The following data has been accumulated from before and after the improvements. At a= 0.05, test to determine if there has been a significant reduction in the average length of stay.
After Before
Sample size 45 58
Mean (in days) 4.6 4.9
Standard Deviation (0") 0.5 0.6
Using a = 0.05, test to see if the average length of stay in RFR is significantly less than the average length of stay in GR. Let a = 0.05.