Figure 11
The table presents the results of a MannWhitney test comparing total service time before and after an intervention. The descriptive statistics show that the median total service time before the intervention was 10 minutes, with 200 samples, and after the intervention, it was 8 minutes, also with 200 samples. The difference in median service time is 2 minutes. The estimation for the difference includes a confidence interval of (1, 3) with an achieved confidence of 95.01 percent. The test section indicates a null hypothesis of no difference (H0: η1 - η2 = 0) and an alternative hypothesis of a difference (H1: η1 - η2 ≠ 0). The W-Value is 46453, and the P-Value is 0.000, both not adjusted and adjusted for ties. All values are approximated.Mann–Whitney test of the total service time for before and after comparison. Source: Authors' own creation