|
|
MAKING IT USEABLE
Editing
Useable Household
The data were examined in order to determine which households met the definition of a 1995 NPTS "useable household." A useable household was defined for the 1995 NPTS as one in which the household interview was completed, and person interviews were completed with at least 50 percent of the adult household members.
In order for the household interview to be considered complete the household respondent must have:
- Provided the complete household roster information for the household members, and
- Given an address for mailing the travel diaries to the household.
In order for a person interview to be considered complete:
- Travel day trip data must have been obtained for at least the destination and start time for each of the person's travel day trips.
In other words, the person interview must have been completed at least through question G.17
, the person's roster of travel day trips.
Interviewer data for all households not meeting the 1995 NPTS definition of a "useable household" were removed from all data files at this point, prior to any further data editing and cleaning.
This definition of useable household also increased the data collection effort. For example, if a household was composed of three adults and two children, and interviews for one adult and two children were completed by the sixth day after travel day, all of the work for that household was discarded. There were 16,243 households in the 1995 NPTS that were considered non-useable.
