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The mean values and KW test results for the usage of different bags before and after tougher measures.
| Measure Status | Inner | Reusable | Old | Charged |
|---|---|---|---|---|
| Before | 0.630 | 0.327 | 0.094 | 0.304 |
| After Change | 0.633 0.40% |
0.446 36.39% |
0.204 117.02% |
0.165 −45.72% |
| KW test | χ2 = 40.705 | χ2 = 124.500 | χ2 = 155.300 | χ2 = 151.660 |
| p = 0.000 | p = 0.000 | p = 0.000 | p = 0.000 |
Note: N = 9786.
