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TABLE 2 - Stratified Ratio Sampling Statistics
Excel | CSV
| Stratum weight |
37% |
31% |
31% |
2% |
100% |
| Mean passenger-miles per
trip |
41 |
123 |
237 |
197 |
129 |
| cv of passenger-miles |
0.68 |
0.63 |
0.62 |
0.45 |
|
| Mean of boardings per
trip |
15 |
39 |
30 |
19 |
27 |
| cv of boardings |
0.56 |
0.71 |
0.54 |
0.46 |
|
| Ratio
of passenger-miles to boardings (average passenger trip length) |
2.81 |
3.21 |
7.78 |
10.54 |
|
| Boardings to
passenger-miles correlation coefficient |
0.89 |
0.88 |
0.79 |
0.79 |
|
| Unit cv of the ratio |
0.31 |
0.34 |
0.38 |
0.3 |
|
| Contribution
to the sum in equation (21) (relative contribution to variance of the
systemwide estimate) |
60 |
549 |
2,479 |
57 |
3,144 |
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