SOME STATISTICAL EVALUATIONS OF TRUCK WEIGHT CHARACTERISTICS IN MISSISSIPPI

THE NUMBER OF TRUCKS NEEDED TO BE WEIGHED WAS DETERMINED SO THAT THE MEAN WEIGHT OF EACH AXLE AND VEHICLE FOR EACH TYPE WOULD HAVE AN ERROR NOT GREATER THAN PLUR OR MINUS 5 PERCENT ON 95 PERCENT CONFIDENCE LIMIT. THIS WAS DONE SEPARATELY FOR EMPTY AND LOADED VEHICLES. ANALYSES OF MEAN WEIGHTS FOR THE PERIODS OF WEIGHT STATIONS OPERATIONS (6 A. M.-2 P.M. : 2 P.M.-10 P.M. : 10 P.M.-6 A.M. : AND 8 A.M. -4 P.M.) DISCLOSED THAT THE PERIOD 2 P.M.-10 P.M. PRODUCED MEAN WEIGHTS WHICH WERE NOT SIGNIFICANTLY DIFFERENT FROM THE MEAN WEIGHTS OF 24-HR OPERATIONS AND, THEREFORE, COULD BE SUBSTITUTED FOR THE 24-HR OPERATIONS PROVIDED THE MEAN WEIGHTS WERE DESIRED. IT WAS FOUND THAT THERE WERE SEVERAL STATISTICAL POPULATIONS (OR UNIVERSES) OF MEAN WEIGHT CHARACTERISTICS WHICH WERE SIGNIFICANTLY DIFFERENT. INDIVIDUAL STATIONS WERE IDENTIFIED IN RELATION TO THESE POPULATIONS, THUS INDICATING THE STATIONS WHERE RELIABLE MEAN WEIGHTS COULD BE OBTAINED AND CORRECTLY INTERPRETED. AN IBM-650 COMPUTER WAS USED FOR STATISTICAL COMPUTATIONS WHICH BASICALLY CONSISTED OF (1) MEAN, (2) STANDARD DEVIATION, (3) STANDARD ERROR OF THE MEAN, (4) SAMPLE SIZES FOR PLUS OR MINUS 5 PERCENT ERROR ON 95 PERCENT CONFIDENCE LIMIT, (5) TEST OF SIGNIFICANCE OF DIFFERENCES BETWEEN MEANS, AND (6) ANALYSIS OF VARIANCE TESTS. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrbbulletin/303/303-004.pdf
• Supplemental Notes:
  • No 303, pp 48-61, 7 TAB Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Petroff, Boris B
  • Sumners, J H
• Conference:
  • 40th Annual Meeting of the Highway Research Board
  • Location: Washington DC, United States
  • Date: 1961-1-9 to 1961-1-13
• Publication Date: 1961

Media Info

• Media Type: Digital/other
• Monograph Title: Motor vehicle speed, volume, weight and travel times
• Serial:
  • Highway Research Board Bulletin
  • Issue Number: 303
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Computer programming; Confidence limits; Standard deviation; Standard error; Statistical analysis; Statistics; Testing; Trucking; Variance; Weight
• Geographic Terms: Mississippi
• Subject Areas: Administration and Management; Data and Information Technology; Freight Transportation; Highways; Motor Carriers; Safety and Human Factors;

Filing Info

• Accession Number: 00222838
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 19 1994 12:00AM