@article{ref1,
title="A statistical evaluation of calibration check intervals",
journal="Journal (Canadian Society of Forensic Science)",
year="2011",
author="Rosland, Micheal and Pon, Ronald",
volume="44",
number="2",
pages="41-46",
abstract="In 2009 the Alcohol Test Committee of the Canadian Society of Forensic Science changed the calibration check interval of Approved Screening Devices from every 2 weeks to every 31 days. Data from 612 calibration checks of a group of Alco-Sensor IV DWF screening devices were analyzed using a contingency table and x2 analysis as well as a significance test for a difference in proportions. There were no statistically significant differences between the length of time of the calibration interval and the frequency of a device requiring recalibration. This analysis shows the Alco-Sensor IV DWF is no more likely to require calibration up to and including a 5 week interval when compared to a 2 week interval, supporting the Alcohol Test Committee decision.<p />",
language="en",
issn="0008-5030",
doi="10.1080/00085030.2011.10768140",
url="http://dx.doi.org/10.1080/00085030.2011.10768140"
}