An experiment is in progress to establish the relationship between breath samples analyzed by the Intoxilyser 5000 and standard blood tests, over blood alcohol levels in excess of the South African statutory limit of 0.08 percent. The paper describes the data collection design adopted to ensure the statistical validity of the relationship for at least three groups of alcohol consumers, namely, in BAC units: (0.08 percent, 0.12 percent), (greater than O.12 percent, 0.16 percent) and (greater than O.16 percent). The influence that various personal characteristics such as age, gender, race, and available physical attributes, may have on the relationship will also be established. The reasons for the adoption of this particular design will also be given. (A)
Samenvatting