A NOTE ON THE CHI-SQUARE TEST WITH APPLICATIONS TO ROAD ACCIDENTS IN CONSTRUCTION ZONES

The routine use of chi-square tests has perhaps led to an incorrect consideration of basic underlying data in two articles in the accident and transportation fields. This paper emphasizes the necessity of comparing actual measured (observed, resultant, etc) units with those which are expected. The two detected errors found in the literature serve as a warning stimulus in using proportions or transformed units instead of the actual numbers in chi-square tests. Several examples of data preparation are exhibited in detail. In addition, road accidents in construction or maintenance zones are analyzed as an application of correct usage of the basic available data.(a) (TRRL)

  • Availability:
  • Corporate Authors:

    Pergamon Press, Incorporated

    Headington Hill Hall
    Oxford OX30BW,   England 
  • Authors:
    • Ceder, Avishai
    • DRESSLER, O
  • Publication Date: 1980-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00325300
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Report/Paper Numbers: HS-028 893
  • Files: HSL, ITRD, TRIS
  • Created Date: Aug 15 1985 12:00AM