Table 3.
The ratio of noise exceedance among enterprises with different characteristics in Beijing, 2023.
| Stratification variables | Large and medium enterprises | Small and micro-sized enterprises | Total | Statistic | |
|---|---|---|---|---|---|
| χ2 | P | ||||
| District, n (%) | |||||
| District A | 0 (0) | 0 (0) | 0 (0) | – | – |
| District B | 0 (0) | 0 (0) | 0 (0) | – | – |
| District C | 2 (100.00) | 0 (0) | 2 (28.57) | 1.0000 | 0.0476 |
| District D | 1 (100.00) | 1 (20.00) | 2 (33.33) | 1.0000 | 0.3333 |
| District E | 0 (0) | 1 (100.00) | 1 (50.00) | 0.5000 | 1.0000 |
| District F | 0 (0) | 1 (33.33) | 1 (25.00) | 0.7500 | 1.0000 |
| District G | 0 (0) | 0 (0) | 0 (0) | – | – |
| District H | 3 (60.00) | 11 (31.43) | 14 (35.00) | 0.9574 | 0.3223 |
| District I | 1 (50.00) | 14 (58.33) | 15 (57.69) | 0.6769 | 1.0000 |
| District J | 7 (70.00) | 21 (70.00) | 28 (70.00) | 0.6447 | 1.0000 |
| District K | 5 (83.33) | 8 (38.10) | 13 (48.15) | 0.9942 | 0.0768 |
| District L | 5 (62.50) | 12 (46.15) | 17 (50.00) | 0.8877 | 0.6880 |
| District M | 1 (25.00) | 0 (0) | 1 (3.23) | 1.0000 | 0.1290 |
| District N | 3 (75.00) | 6 (31.58) | 9 (39.13) | 0.9858 | 0.2601 |
| District O | 0 (0) | 11 (40.74) | 11 (39.29) | 0.6071 | 1.0000 |
| District P | 0 (0) | 2 (25.00) | 2 (25.00) | – | – |
| Industries, n (%) | |||||
| Electricity and heat production and supply industry | 1 (100.00) | 0 (0) | 1 (100.00) | – | – |
| Manufacturing of other nonmetallic mineral products | 2 (66.67) | 2 (20.00) | 4 (30.77) | 0.9860 | 0.2028 |
| Ferrous metal smelting and rolling industry | 1 (100.00) | 0 (0) | 1 (100.00) | – | – |
| Manufacturing of chemicals and chemical products | 0 (0) | 2 (33.33) | 2 (28.57) | 0.7143 | 1.0000 |
| Computer, communications and other electronic equipment manufacturing | 3 (50.00) | 2 (22.22) | 5 (33.33) | 0.9530 | 0.3287 |
| Manufacturing of furniture | 0 (0) | 3 (100.00) | 3 (100.00) | – | – |
| Manufacturing of metal products | 0 (0) | 28 (66.67) | 28 (65.12) | 0.3488 | 0.3488 |
| Manufacturing of motor vehicles | 13 (72.22) | 14 (35.90) | 27 (47.37) | 6.5183 | 0.0107 |
| Manufacturing of coke and refined petroleum products | 0 (0) | 0 (0) | 0 (0) | – | – |
| Railway, shipping, aerospace and other transportation equipment manufacturing | 2 (100.00) | 5 (83.33) | 7 (87.50) | 1.0000 | 1.0000 |
| General equipment manufacturing | 0 (0) | 12 (29.27) | 12 (27.91) | 0.5150 | 1.0000 |
| Pharmaceutical manufacturing industry | 0 (0) | 0 (0) | 0 (0) | – | – |
| Instrumentation manufacturing industry | 1 (100.00) | 1 (33.33) | 2 (50.00) | 1.0000 | 1.0000 |
| Printing and reproduction of recorded media industry | 0 (0) | 8 (17.02) | 8 (16.00) | 0.5857 | 1.0000 |
| Nonferrous metal smelting and rolling industry | 0 (0) | 2 (66.67) | 2 (66.67) | – | – |
| Special equipment manufacturing industry | 5 (71.43) | 9 (32.14) | 14 (40.00) | 0.9901 | 0.0897 |
| Ownership type, n (%) | |||||
| State-owned | 6 (54.55) | 5 (20.83) | 11 (31.43) | – | 0.5691 |
| Collective | 0 (0) | 2 (25.00) | 2 (25.00) | ||
| Joint-equity cooperative enterprises | 0 (0) | 0 (0) | 0 (0) | ||
| Joint-operate | 1 (100.00) | 0 (0) | 1 (50.00) | ||
| Private | 0 (0) | 7 (36.84) | 7 (36.84) | ||
| Incorporated company | 1 (50.00) | 1 (33.33) | 2 (40.00) | ||
| Limited liability company | 13 (59.09) | 58 (38.16) | 71 (40.80) | ||
| Hong Kong, Macau, and Taiwan invested enterprises | 0 (0) | 2 (50.00) | 2 (50.00) | ||
| Foreign | 5 (62.50) | 10 (52.63) | 15(55.56) | ||
| Others | 2 (66.67) | 3 (50.00) | 5 (55.56) | ||
| Total | 28 (59.57) | 88 (36.82) | 116 (40.56) | 8.4350 | 0.0037 |