Table 9 Comparison of sample – sample inferential statistics over the difference of inspection score by two independent samples non-parametric test
Difference of combined, food establishments and food handlers inspection score before and after the interventions in two independent samples of 50 food establishments | Mean Rank – Mean Rank | Mann–Whitney | Z—statistics | Independent sample Mann Whitney U Testa – P value |
|---|---|---|---|---|
Difference of combined inspection score before & after the intervention in 50 food establishments | ||||
Control-Intervention 1 | 37.65 – 60.88 | 631 | -4.048 | p < 0.0001 |
Control-Intervention 2 | 35.65 – 62.8 | 535 | -4.728 | p < 0.0001 |
Intervention 1- Intervention 2b | 41.34 – 59.66 | 792 | -3.159 | p < 0.002 |
Difference of inspection score of food establishments before & after the intervention in 50 food establishments | ||||
Control-Intervention 1 | 44.12 – 56.88 | 931 | -2.299 | p = 0.021 |
Control-Intervention 2 | 39.08 – 61.92 | 679 | -4.024 | p < 0.0001 |
Intervention 1- Intervention 2 | 40.98 – 60.02 | 774 | -3.207 | p = 0.001 |
Difference of inspection score of food handlers before & after the intervention in 50 food establishments | ||||
Control-Intervention 1 | 42.58 – 58.42 | 854 | -2.730 | p = 0.006 |
Control-Intervention 2 | 37.49 – 63.51 | 599.5 | -4.407 | p < 0.0001 |
Intervention 1- Intervention 2 | 42.56 – 58.44 | 853 | -2.744 | p = 0.006 |