NASS ESTIMATION VOLUME I: TECHNICAL REPORT

This is the final report describing an automated system for computing statistical estimates and associated sampling errors for items in the NASS analysis file. Most of the components of the system are programmed for the SAS environment. A primary feature of the system is the capability of estimating a wide variety of national statistics, from simple totals to complex transformations of data items, at the discretion of the user. The system computes sampling errors using the method of balanced half-sample replications. Additionally, the system permits the use of ratio estimation techniques, which may result in mean square errors below those obtained using unbiased inflation estimates. No software revisions are required as the NASS expands from 10 to 75 survey PSU's. The report discusses the use of a previously developed computer program to impute data values for NASS items subject to nonresponse. An experiment using the imputation procedure on 1979 NASS data is described, and the effectiveness of the imputation is summarized.

• Corporate Authors:

  Westat, Incorporated

  Research Division, 11600 Nebel Street
  Rockville, MD  United States  20852

  National Highway Traffic Safety Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Binzer, G
  • Edmonds, H J
  • Hanson, R H
  • Morganstein, D R
  • Waksberg, J
• Publication Date: 1982-7

Media Info

• Features: Figures; Tables;
• Pagination: 494 p.

Subject/Index Terms

• TRT Terms: Computer programs; Estimating; Highways; Safety and security; Statistical sampling; Statistics; Transportation safety
• Identifier Terms: National Accident Sampling System
• Subject Areas: Data and Information Technology; Highways; Safety and Human Factors; I81: Accident Statistics;

Filing Info

• Accession Number: 00380577
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: Final Rpt., HS-806 419
• Contract Numbers: DTNH22-80R-07561
• Files: HSL, TSR, TRIS, USDOT
• Created Date: Jan 30 1984 12:00AM