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Table A1 - Household weighting for the 2002 National Transportation Availability and Use Survey sample

Table A1 - Household weighting for the 2002 National Transportation Availability and Use Survey sample

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  Total*
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