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Table A1 - Household weighting for the 2002 National Transportation Availability
and Use Survey sample
Excel | CSV
| 1. Base weight |
|
| 1.1 Sample size |
40,000 |
| 1.2 Sum of weights |
258,527,500 |
| 2. Adjusting for unknown residential
records* |
|
| 2.1 Sum of weights by residential status |
258,527,500 |
| a. Residential |
93,457,691 |
| b. Nonresidential |
139,120,111 |
| c. Unknown residential status – NA, NM |
25,949,698 |
| d. CASRO residential rate |
0.402 |
| 2.2 Sum of weights after allocating NA,
NM residential records |
103,885,165 |
| a. Residential |
93,457,691 |
| b. Nonresidential |
0 |
| c. Unknown residential status - NA, NM |
10,427,473 |
| 2.3 Sum of weights after adjustment |
103,885,165 |
| a. Residential |
103,885,165 |
| b. Nonresidential |
0 |
| c. Unknown residential status-assumed to
be residential |
0 |
| 2.4 Coefficient of Variation (CV) |
1.65 |
| 3. Screener nonresponse adjustment |
|
| 3.1 Sum of weights before adjustment |
103,885,165 |
| a. Respondents |
74,152,690 |
| b. Nonrespondents |
29,732,475 |
| 3.2 Sum of weights after adjustment |
103,885,165 |
| 3.3 CV |
7.53 |
| 4. Adjusting for subsampling – households
w/o disabled residents |
|
| 4.1 Sum of weights before adjustment |
103,885,165 |
| a. Households with disabled |
25,435,237 |
| b. Households with nondisabled – subsampled |
26,420,565 |
| c. Households with nondisabled - not sampled |
52,029,363 |
| 4.2 Sum of weights after adjustment |
103,885,165 |
| a. Households with disabled |
25,435,237 |
| b. Households with nondisabled – subsampled |
78,449,928 |
| c. Households with nondisabled - not sampled |
0 |
| 4.3 CV – Households with disabled |
7.50 |
| 4.4 CV – Households with nondisabled |
10.66 |
| 5. Nontelephone adjustment |
|
| 5.1 Sum of weights before adjustment |
103,885,165 |
| 5.2 Sum of weights after adjustment |
97,106,619 |
| 5.3 Adjustment Factor |
0.935 |
| 5.4 CV – Households with disabled |
19.48 |
| 5.5 CV – Households with nondisabled |
21.52 |
| 6. Household Poststratification |
|
| 6.1 Number of completed screener interviews |
5,162 |
| 6.2 Sum of weights before adjustment |
97,106,619 |
| 6.3 Sum of weights after adjustment |
105,480,101 |
| 6.4 Adjustment factor |
1.09 |
| 6.5 CV – Households with disabled |
42.53 |
| 6.6 CV – Households with nondisabled |
43.55 |
* Some rows within sections may not sum to the respective totals
due to rounding.
Source: 2002 Transportation Availability and Use Study
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