Hence, these data enjoy an almost 100 percent response rate. Sampling Errors Not applicable. Data are collected from each member of the population of interest. The databases have been changed periodically to reflect changing data needs as well as developments within the airline industry. The data are routinely examined to uncover nonsampling errors and a process is in place to correct inaccurate or incomplete data.
All data are subject to nonsampling errors.
This name is given to any error not due to sampling that arises in data. When nonentry errors are detected by the OAI, the OAI contacts the air carrier with a formal notice of the nonentry error, and has established follow-up procedures to ensure that the data are reported, or the carrier is referred to the DOT General Counsel s Enforcement Office for appropriate sanctions, fines or penalties. Duplicate Entry Error - Duplicate data entries are possible but edit programs have been designed to check for these errors. Data - Because of the high volume of data, it is possible that some data elements might be missing from the originally reported data. When missing data errors are detected by the OAI DBA, the DBA contacts the air carrier about the error, and has established follow-up procedures to ensure that the data are reported, or the carrier is referred to the DOT General Counsel s Enforcement Office for appropriate sanctions, fines or penalties.