Simpulan
Hasil penelitian menunjukan bahwa gas CO merupakan gas yang sangat berkontribusi dari aktivitas transportasi di Ruas Jalan Mayor Oking Desa Citeureup Kecamatan Citeureup Kabupaten Bogor memiliki rata-rata jumlah total beban emisi sebesar 157436 g/jam. yang terdiri dari CO 72.5% sebesar 114139 g/jam, NOx 3.3% sebesar 5231 g/jam, SO2 0.1% sebesar 225 g/jam, HC 23% sebesar 36285 g/jam, PM10 1% sebesar 1555 g/jam. Konsentrasi tertinggi CO sebesar 355 µg/m3, NOx sebesar 15 µg/m3, SO2 sebesar 0.62 µg/m3, HC sebesar 112 µg/m3, PM10 sebesar 4.7 µg/m3, dari semua konsentrasi udara ambien yang dihasilkan dari kendaraan bermotor nilainya berada dibawah baku mutu. Hal ini mengindikasikan bahwa masih dalam kondisi yang aman bagi kesehatan manusia. Konsentrasi Karbon monoksida, Nitrogen oksida, Sulfur dioksida, Hidro karbon dan PM10 mempunyai korelasi negatif dengan kecepatan angin yang berarti bahwa semakin besar kecepatan angin maka akan menurunkan konsentrasi polutan dan sebaliknya semakin rendah kecepatan angin konsentrasi polutan tinggi.
Saran
1. Pemantauan konsentrasi polutan perlu dilakukan oleh pemerintah setempat secara berkala agar dapat mengetahui kondisi suatu wilayah akibat kegiatan transportasi sebagai data pembanding serta untuk mendukung pengendalian pencemaran udara.
2. Perlu dilakukan penelitian lebih lanjut dengan periode waktu yang lebih panjang dan menggunakan model lain yang lebih kompleks.
LAMPIRAN
Lampiran 1 Peta Kecamatan Citeureup
Lampiran 2 Jumlah hari hujan dan curah hujan di Kecamatan Citeureup pada stasiun pos hujan Ciriung
Bulan Hari Hujan Curah Hujan (mm) Januari 19 213 Februari 20 394 Maret 14 186 April 17 253 Mei 14 268 Juni 5 88 Juli 14 42 Agustus 6 15 September 9 141 Oktober 15 281 Nopember 15 443 Desember 22 301
Lampiran 3 Jumlah Kendaraan
Hari- Tanggal Jam Mobil Motor Truk Bis Total Sabtu, 28 Maret 2015 06.00 - 07.00 485 2425 10 5 2925 16.00-17.00 535 2392 20 18 2965 Minggu, 29 Maret 2015 06.00 - 07.00 297 1453 3 3 1756 16.00-17.00 474 2173 5 3 2655 Senin, 30 Maret 2015 06.00 - 07.00 438 3059 13 5 3515 16.00-17.00 459 2519 32 27 3037 Selasa, 31 Maret 2015 06.00 - 07.00 422 2373 11 10 2816 16.00-17.00 488 2244 35 17 2784 Rabu , 1 April 2015 06.00 - 07.00 477 2505 15 5 3002 16.00-17.00 504 2419 25 12 2960 Kamis, 2 April 2015 06.00 - 07.00 449 2616 12 9 3086 16.00-17.00 456 1775 40 17 2288 Sabtu, 4 April 2015 06.00 - 07.00 480 2394 9 8 2891 16.00-17.00 438 1369 42 12 1861 Minggu, 5 April 2015 06.00 - 07.00 331 1501 3 2 1837 16.00-17.00 433 2292 6 3 2734
Lampiran 4 Beban emisi CO
Hari, Tanggal Jam Mobil Motor Truk Bis Total
(g/jam) (g/jam) (g/jam) (g/jam) (g/jam)
Sabtu,28 Maret 2015 06.00 - 07.00 39130 84541 209 137 124017 16.00-17.00 43164 83390 418 493 127466 Minggu, 29 Maret 2015 06.00 - 07.00 23962 50655 63 82 74762 16.00-17.00 38243 75755 105 82 114185 Senin, 30 Maret 2015 06.00 - 07.00 35338 106643 272 137 142390 16.00-17.00 37033 87818 669 740 126259 Selasa, 31 Maret 2015 06.00 - 07.00 34047 82728 230 274 117279 16.00-17.00 39372 78231 732 466 118801 Rabu , 1 April 2015 06.00 - 07.00 38485 87330 314 137 126265 16.00-17.00 40663 84331 523 329 125846 Kamis,2 April 2015 06.00 - 07.00 36226 91199 251 247 127922 16.00-17.00 36790 61880 837 466 99973 Sabtu,4 April 2015 06.00 - 07.00 38727 83460 188 219 122594 16.00-17.00 35338 47726 879 329 84272 Minggu,5 April 2015 06.00 - 07.00 26705 52328 63 55 79151 16.00-17.00 34935 79904 126 82 115046
Lampiran 5 Konsentrasi emisi CO
Hari- Tanggal Jam Laju emisi Panjang jalan Kec. angin Mixing Height konsentrasi (g/m2s) (m) (m/s) (m) (µg/m3)
Sabtu,28 Maret 2015 06.00 - 07.00 1.37797E-05 2500 0.1 946 262
16.00-17.00 1.41629E-05 2500 3.5 822 12
Minggu, 29 Maret 2015 06.00 - 07.00 8.30686E-06 2500 0.4 930 62
16.00-17.00 1.26872E-05 2500 4.0 795 10
Senin, 30 Maret 2015 06.00 - 07.00 1.58211E-05 2500 0.2 685 289
16.00-17.00 1.40288E-05 2500 3.3 630 17
Selasa, 31 Maret 2015 06.00 - 07.00 1.3031E-05 2500 0.3 731 149
16.00-17.00 1.32001E-05 2500 3.8 656 13
Rabu , 1 April 2015 06.00 - 07.00 1.40294E-05 2500 0.4 578 152
16.00-17.00 1.39829E-05 2500 2.9 454 27
Kamis,2 April 2015 06.00 - 07.00 1.42136E-05 2500 0.3 585 202
16.00-17.00 1.11081E-05 2500 2.5 435 26
Sabtu,4 April 2015 06.00 - 07.00 1.36216E-05 2500 0.2 483 353
16.00-17.00 9.36352E-06 2500 3.4 460 15
Minggu,5 April 2015 06.00 - 07.00 8.79455E-06 2500 0.3 792 93
16.00-17.00 1.27829E-05 2500 3.1 691 15
(Sumber mixing height : http://www.ready.noaa.gov/ready2-bin/stability2a.pl) Lampiran 6 Beban emisi NOx
Hari, Tanggal Jam Mobil Motor Truk Bis Total
(g/jam) (g/jam) (g/jam) (g/jam) (g/jam)
Sabtu,28 Maret 2015 06.00 - 07.00 2778 1751 441 148 5118 16.00-17.00 3064 1727 882 533 6206 Minggu, 29 Maret 2015 06.00 - 07.00 1701 1049 132 89 2971 16.00-17.00 2715 1569 220 89 4593 Senin, 30 Maret 2015 06.00 - 07.00 2509 2209 573 148 5439 16.00-17.00 2629 1819 1410 800 6658 Selasa, 31 Maret 2015 06.00 - 07.00 2417 1714 485 296 4912 16.00-17.00 2795 1620 1543 504 6462 Rabu , 1 April 2015 06.00 - 07.00 2732 1809 661 148 5350 16.00-17.00 2887 1747 1102 356 6091 Kamis,2 April 2015 06.00 - 07.00 2572 1889 529 267 5256 16.00-17.00 2612 1282 1763 504 6160 Sabtu,4 April 2015 06.00 - 07.00 2749 1729 397 237 5112 16.00-17.00 2509 989 1851 356 5704 Minggu,5 April 2015 06.00 - 07.00 1896 1084 132 59 3171 16.00-17.00 2480 1655 264 89 4488
Lampiran 7 Konsentrasi emisi NOx
Hari- Tanggal jam Laju emisi Panjang jalan Kec. angin Mixing Height konsentrasi (g/m2s) (m) (m/s) (m) (µg/m3)
Sabtu,28 Maret 2015 06.00 - 07.00 5.68653E-07 2500 0.1 946 15 16.00-17.00 6.896E-07 2500 3.5 822 0.6 Minggu, 29 Maret 2015 06.00 - 07.00 3.30158E-07 2500 0.4 930 2.5 16.00-17.00 5.10362E-07 2500 4.0 795 0.4 Senin, 30 Maret 2015 06.00 - 07.00 6.04307E-07 2500 0.2 685 11 16.00-17.00 7.39826E-07 2500 3.3 630 0.9 Selasa, 31 Maret 2015 06.00 - 07.00 5.4575E-07 2500 0.3 731 6.2 16.00-17.00 7.17982E-07 2500 3.8 656 0.7 Rabu , 1 April 2015 06.00 - 07.00 5.94468E-07 2500 0.4 578 6.4 16.00-17.00 6.7677E-07 2500 2.9 454 1.3 Kamis,2 April 2015 06.00 - 07.00 5.84034E-07 2500 0.3 585 8.3 16.00-17.00 6.84473E-07 2500 2.5 435 1.6 Sabtu,4 April 2015 06.00 - 07.00 5.67964E-07 2500 0.2 483 14.7
16.00-17.00 6.33774E-07 2500 3.4 460 1 Minggu,5 April 2015 06.00 - 07.00 3.52353E-07 2500 0.3 792 3.7
16.00-17.00 4.98716E-07 2500 3.1 691 0.6
(Sumber mixing height : http://www.ready.noaa.gov/ready2-bin/stability2a.pl) Lampiran 8 Beban emisi SO2
Hari, Tanggal jam Mobil Motor Truk Bis Total
(g/jam) (g/jam) (g/jam) (g/jam) (g/jam)
Sabtu,28 Maret 2015 06.00 - 07.00 133 48 20 12 213 16.00-17.00 147 48 41 42 277 Minggu, 29 Maret 2015 06.00 - 07.00 81 29 6 7 123 16.00-17.00 130 43 10 7 190 Senin, 30 Maret 2015 06.00 - 07.00 120 61 27 12 219 16.00-17.00 126 50 65 63 304 Selasa, 31 Maret 2015 06.00 - 07.00 116 47 22 23 208 16.00-17.00 134 45 71 39 289 Rabu , 1 April 2015 06.00 - 07.00 131 50 31 12 223 16.00-17.00 138 48 51 28 265 Kamis,2 April 2015 06.00 - 07.00 123 52 25 21 220 16.00-17.00 125 35 82 39 281 Sabtu,4 April 2015 06.00 - 07.00 131 48 18 19 216 16.00-17.00 120 27 86 28 261 Minggu,5 April 2015 06.00 - 07.00 91 30 6 5 131 16.00-17.00 119 46 12 7 183
Lampiran 9 Konsentrasi emisi SO2
Hari- Tanggal Jam Laju emisi Panjang jalan Kec. angin Mixing Height konsentra (g/m2s) (m) (m/s) (m) (µg/m3)
Sabtu,28 Maret 2015 06.00 - 07.00 2.36841E-08 2500 0.1 946 0.45 16.00-17.00 3.07467E-08 2500 3.5 822 0.03 Minggu, 29 Maret 2015 06.00 - 07.00 1.3708E-08 2500 0.4 930 0.10 16.00-17.00 2.11425E-08 2500 4.0 795 0.02 Senin, 30 Maret 2015 06.00 - 07.00 2.43376E-08 2500 0.2 685 0.44 16.00-17.00 3.37532E-08 2500 3.3 630 0.04 Selasa, 31 Maret 2015 06.00 - 07.00 2.3165E-08 2500 0.3 731 0.26 16.00-17.00 3.21346E-08 2500 3.8 656 0.03 Rabu , 1 April 2015 06.00 - 07.00 2.47521E-08 2500 0.4 578 0.27 16.00-17.00 2.94535E-08 2500 2.9 454 0.06 Kamis,2 April 2015 06.00 - 07.00 2.44942E-08 2500 0.3 585 0.35 16.00-17.00 3.12569E-08 2500 2.5 435 0.07 Sabtu,4 April 2015 06.00 - 07.00 2.40084E-08 2500 0.2 483 0.62 16.00-17.00 2.89776E-08 2500 3.4 460 0.05 Minggu,5 April 2015 06.00 - 07.00 1.45917E-08 2500 0.3 792 0.15
16.00-17.00 2.03849E-08 2500 3.1 691 0.02
(Sumber mixing height : http://www.ready.noaa.gov/ready2-bin/stability2a.pl) Lampiran 10 Beban emisi HC
Hari, Tanggal Jam Mobil Motor Truk Bis Total
(g/jam) (g/jam) (g/jam) (g/jam) (g/jam)
Sabtu,28 Maret 2015 06.00 - 07.00 3865 35628 45 16 39554 16.00-17.00 4263 35143 90 58 39554 Minggu, 29 Maret 2015 06.00 - 07.00 2367 21347 13 10 23737 16.00-17.00 3777 31925 22 10 35735 Senin, 30 Maret 2015 06.00 - 07.00 3490 44942 58 16 48507 16.00-17.00 3658 37009 143 87 40897 Selasa, 31 Maret 2015 06.00 - 07.00 3363 34864 49 32 38308 16.00-17.00 3889 32969 157 55 37069 Rabu , 1 April 2015 06.00 - 07.00 3801 36803 67 16 40688 16.00-17.00 4016 35540 112 39 39707 Kamis,2 April 2015 06.00 - 07.00 3578 38434 54 29 42095 16.00-17.00 3634 26078 179 55 29946 Sabtu,4 April 2015 06.00 - 07.00 3825 35172 40 26 39063 16.00-17.00 3490 20113 188 39 23830 Minggu,5 April 2015 06.00 - 07.00 2638 22053 13 6 24710 16.00-17.00 3450 33674 27 10 37161
Lampiran 11 Konsentrasi emisi HC
Hari- Tanggal Jam Laju emisi Panjang
jalan Kec. angin Mixing Height konsentrasi (g/m2s) (m) (m/s) (m) (µg/m3)
Sabtu,28 Maret 2015 06.00 - 07.00 4.39484E-06 2500 0.1 946 84 16.00-17.00 4.39489E-06 2500 3.5 822 3.8 Minggu, 29 Maret 2015 06.00 - 07.00 2.63746E-06 2500 0.4 930 20 16.00-17.00 3.97052E-06 2500 4.0 795 3.1 Senin, 30 Maret 2015 06.00 - 07.00 5.38968E-06 2500 0.2 685 98 16.00-17.00 4.54414E-06 2500 3.3 630 5.5 Selasa, 31 Maret 2015 06.00 - 07.00 4.25647E-06 2500 0.3 731 49 16.00-17.00 4.11879E-06 2500 3.8 656 4.1 Rabu , 1 April 2015 06.00 - 07.00 4.52084E-06 2500 0.4 578 49 16.00-17.00 4.41185E-06 2500 2.9 454 8.4 Kamis,2 April 2015 06.00 - 07.00 4.67719E-06 2500 0.3 585 67 16.00-17.00 3.32734E-06 2500 2.5 435 7.6 Sabtu,4 April 2015 06.00 - 07.00 4.34039E-06 2500 0.2 483 112 16.00-17.00 2.64783E-06 2500 3.4 460 4.2 Minggu,5 April 2015 06.00 - 07.00 2.74556E-06 2500 0.3 792 29
16.00-17.00 4.12897E-06 2500 3.1 691 4.8
(Sumber mixing height : http://www.ready.noaa.gov/ready2-bin/stability2a.pl) Lampiran 12 Beban emisi PM10
Hari, Tanggal jam Mobil Motor Truk Bis Total
(g/jam) (g/jam) (g/jam) (g/jam) (g/jam)
Sabtu,28 Maret 2015 06.00 - 07.00 145 1449 35 17 1646 16.00-17.00 160 1430 70 63 1722 Minggu, 29 Maret 2015 06.00 - 07.00 89 868 10 10 978 16.00-17.00 142 1299 17 10 1468 Senin, 30 Maret 2015 06.00 - 07.00 131 1828 45 17 2022 16.00-17.00 137 1505 112 94 1848 Selasa, 31 Maret 2015 06.00 - 07.00 126 1418 38 35 1618 16.00-17.00 146 1341 122 59 1668 Rabu , 1 April 2015 06.00 - 07.00 143 1497 52 17 1709 16.00-17.00 151 1446 87 42 1725 Kamis,2 April 2015 06.00 - 07.00 134 1563 42 31 1771 16.00-17.00 136 1061 139 59 1396 Sabtu,4 April 2015 06.00 - 07.00 143 1431 31 28 1633 16.00-17.00 131 818 146 42 1137 Minggu,5 April 2015 06.00 - 07.00 99 897 10 7 1013 16.00-17.00 129 1370 21 10 1531
Lampiran 13 Konsentrasi emisi PM10
Hari- Tanggal Jam Laju emisi Panjang jalan Kec. angin Mixing Height konsentrasi (g/m2s) (m) (m/s) (m) (µg/m3)
Sabtu,28 Maret 2015 06.00 - 07.00 1.82943E-07 2500 0.1 946 3.5
16.00-17.00 1.91321E-07 2500 3.5 822 0.2
Minggu, 29 Maret 2015 06.00 - 07.00 1.0867E-07 2500 0.4 930 0.8
16.00-17.00 1.63132E-07 2500 4.0 795 0.1
Senin, 30 Maret 2015 06.00 - 07.00 2.24645E-07 2500 0.2 685 4.1
16.00-17.00 2.05365E-07 2500 3.3 630 0.2
Selasa, 31 Maret 2015 06.00 - 07.00 1.79722E-07 2500 0.3 731 2.0
16.00-17.00 1.85356E-07 2500 3.8 656 0.2
Rabu , 1 April 2015 06.00 - 07.00 1.89927E-07 2500 0.4 578 2.1
16.00-17.00 1.91697E-07 2500 2.9 454 0.4
Kamis,2 April 2015 06.00 - 07.00 1.96755E-07 2500 0.3 585 2.8
16.00-17.00 1.55087E-07 2500 2.5 435 0.4
Sabtu,4 April 2015 06.00 - 07.00 1.81493E-07 2500 0.2 483 4.7
16.00-17.00 1.26367E-07 2500 3.4 460 0.2
Minggu,5 April 2015 06.00 - 07.00 1.12599E-07 2500 0.3 792 1.2
16.00-17.00 1.70061E-07 2500 3.1 691 0.2
(Sumber mixing height : http://www.ready.noaa.gov/ready2-bin/stability2a.pl) Lampiran 14 Baku Mutu Ambien Nasional
Parameter Waktu pengukuran Baku mutu Metode Analisis Peralatan µg/m3
CO 1 jam 30000 NDIR NDIR Analyzer
(Karbon Monoksida) 24 jam 10000
NOx 1 jam 400 Saltzman Spektrofotometer
(Nitrogen oksida) 24 jam 150
1 Tahun 100
SO2 1 jam 900 Pararosanilin Spektrofotometer
(Sulfur dioksida) 24 jam 365
1 Tahun 60 HC 3 jam 160 Flame Ionization Gas Chromatogarfi (Hidro karbon)
PM10 24 jam 150 Gravimetric Hi-Vol
Lampiran 15 Uji proporsi dua arah beban emisi CO tiap kendaraan bermotor
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Mobil
Test and CI for Two Proportions Sample X N Sample p 1 37244 123092 0.302570 2 35026 105187 0.332988 Difference = p (1) - p (2)
Estimate for difference: -0.0304175
95% CI for difference: (-0.0342511, -0.0265838)
Test for difference = 0 (vs not = 0): Z = -15.55 P-Value = 0.000 Motor
Test and CI for Two Proportions Sample X N Sample p 1 85020 123092 0.690703 2 69720 105187 0.662820 Difference = p (1) - p (2)
Estimate for difference: 0.0278833
95% CI for difference: (0.0240325, 0.0317342)
Test for difference = 0 (vs not = 0): Z = 14.19 P-Value = 0.000 Truk
Test and CI for Two Proportions Sample X N Sample p
1 478 123092 0.003883 2 256 105187 0.002434 Difference = p (1) - p (2)
Estimate for difference: 0.00144951
95% CI for difference: (0.000991928, 0.00190710)
Test for difference = 0 (vs not = 0): Z = 6.21 P-Value = 0.000 Bis
Test and CI for Two Proportions Sample X N Sample p
1 349 123092 0.002835 2 185 105187 0.001759
Difference = p (1) - p (2)
Estimate for difference: 0.00107651
95% CI for difference: (0.000686184, 0.00146683)
Test for difference = 0 (vs not = 0): Z = 5.41 P-Value = 0.000
Lampiran 16 Uji proporsi dua arah beban emisi NOx tiap kendaraan bermotor Mobil
Test and CI for Two Proportions Sample X N Sample p
1 2644 5791 0.456571 2 2486 4671 0.532220 Difference = p (1) - p (2)
Estimate for difference: -0.0756495
95% CI for difference: (-0.0948676, -0.0564315)
Test for difference = 0 (vs not = 0): Z = -7.72 P-Value = 0.000 Motor
Test and CI for Two Proportions Sample X N Sample p
1 1761 5791 0.304093 2 1444 4671 0.309142 Difference = p (1) - p (2)
Estimate for difference: -0.00504895
95% CI for difference: (-0.0228260, 0.0127281)
Test for difference = 0 (vs not = 0): Z = -0.56 P-Value = 0.578 Truk
Test and CI for Two Proportions Sample X N Sample p
1 1008 5791 0.174063 2 540 4671 0.115607 Difference = p (1) - p (2)
Estimate for difference: 0.0584563
95% CI for difference: (0.0450603, 0.0718522)
Bis
Test and CI for Two Proportions Sample X N Sample p
1 378 5791 0.065274 2 200 4671 0.042817 Difference = p (1) - p (2)
Estimate for difference: 0.0224563
95% CI for difference: (0.0138436, 0.0310690)
Test for difference = 0 (vs not = 0): Z = 5.11 P-Value = 0.000
Lampiran 17 Uji proporsi dua arah beban emisi NO2 tiap kendaraan bermotor Mobil
Test and CI for Two Proportions Sample X N Sample p
1 126 251 0.501992 2 119 199 0.597990 Difference = p (1) - p (2)
Estimate for difference: -0.0959979
95% CI for difference: (-0.188013, -0.00398329)
Test for difference = 0 (vs not = 0): Z = -2.04 P-Value = 0.041 Motor
Test and CI for Two Proportions Sample X N Sample p
1 49 251 0.195219 2 40 199 0.201005 Difference = p (1) - p (2)
Estimate for difference: -0.00578590
95% CI for difference: (-0.0799797, 0.0684079)
Test for difference = 0 (vs not = 0): Z = -0.15 P-Value = 0.879 Truk
Test and CI for Two Proportions Sample X N Sample p
1 47 251 0.187251 2 25 199 0.125628
Difference = p (1) - p (2)
Estimate for difference: 0.0616229
95% CI for difference: (-0.00508262, 0.128328)
Test for difference = 0 (vs not = 0): Z = 1.81 P-Value = 0.070 Bis
Test and CI for Two Proportions Sample X N Sample p
1 30 251 0.119522 2 16 199 0.080402 Difference = p (1) - p (2)
Estimate for difference: 0.0391199
95% CI for difference: (-0.0159971, 0.0942369)
Test for difference = 0 (vs not = 0): Z = 1.39 P-Value = 0.164
Lampiran 18 Uji proporsi dua arah beban emisi HC tiap kendaraan bermotor Mobil
Test and CI for Two Proportions Sample X N Sample p
1 3678 39652 0.092757 2 3459 32918 0.105079 Difference = p (1) - p (2)
Estimate for difference: -0.0123223
95% CI for difference: (-0.0166957, -0.00794890)
Test for difference = 0 (vs not = 0): Z = -5.52 P-Value = 0.000 Motor
Test and CI for Two Proportions Sample X N Sample p 1 35830 39652 0.903611 2 29382 32918 0.892582 Difference = p (1) - p (2)
Estimate for difference: 0.0110299
95% CI for difference: (0.00659962, 0.0154601)
Truk
Test and CI for Two Proportions Sample X N Sample p
1 103 39652 0.002598 2 55 32918 0.001671 Difference = p (1) - p (2)
Estimate for difference: 0.000926781
95% CI for difference: (0.000259207, 0.00159435)
Test for difference = 0 (vs not = 0): Z = 2.72 P-Value = 0.007 Bis
Test and CI for Two Proportions Sample X N Sample p
1 41 39652 0.001034 2 22 32918 0.000668 Difference = p (1) - p (2)
Estimate for difference: 0.000365668
95% CI for difference: (-5.62433E-05, 0.000787580)
Test for difference = 0 (vs not = 0): Z = 1.70 P-Value = 0.089
Lampiran 19 Uji proporsi dua arah beban emisi PM10 tiap kendaraan bermotor Mobil
Test and CI for Two Proportions Sample X N Sample p
1 138 1720 0.080233 2 130 1391 0.093458 Difference = p (1) - p (2)
Estimate for difference: -0.0132254
95% CI for difference: (-0.0331952, 0.00674439)
Test for difference = 0 (vs not = 0): Z = -1.30 P-Value = 0.194 Motor
Test and CI for Two Proportions Sample X N Sample p
1 1457 1720 0.847093 2 1195 1391 0.859094
Difference = p (1) - p (2)
Estimate for difference: -0.0120012
95% CI for difference: (-0.0369729, 0.0129706)
Test for difference = 0 (vs not = 0): Z = -0.94 P-Value = 0.346 Truk
Test and CI for Two Proportions Sample X N Sample p
1 80 1720 0.046512 2 43 1391 0.030913 Difference = p (1) - p (2)
Estimate for difference: 0.0155986
95% CI for difference: (0.00211605, 0.0290812)
Test for difference = 0 (vs not = 0): Z = 2.27 P-Value = 0.023 Bis
Test and CI for Two Proportions Sample X N Sample p
1 44 1720 0.025581 2 24 1391 0.017254 Difference = p (1) - p (2)
Estimate for difference: 0.00832762
95% CI for difference: (-0.00179655, 0.0184518)