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By John D. Kalbfleisch, Cyntha A. Struthers, Duncan C. Thomas (auth.), Jane F. Gentleman, G. A. Whitmore (eds.)

This quantity is a set of 8 Case stories in info research that seemed in a variety of problems with the Canadian magazine of information (OS) over a twelve­ yr interval from 1982 to 1993. One follow-up article to Case research No.4 can be incorporated within the quantity. The OS's part on Case reviews in facts research was once initiated by means of a former editor who desired to raise the analytical content material of the magazine. We have been requested to turn into part Co-Editors and to advance a structure for the case stories. each one case learn offers analyses of a true facts set through or extra analysts or groups of analysts operating independently in a simulated consulting context. The part aimed toward demonstrating the method of statistical research and the potential range of methods and conclusions. for every case learn, the Co-Editors discovered a suite of actual Canadian facts, posed what they suggestion was once an attractive statistical challenge, and recruited analysts operating in Canada who have been prepared to take on it. the broadcast case reports describe the information and the matter, and current and talk about the analysts' recommendations. For a few case reports, the prone of the knowledge have been invited to give a contribution their very own analysis.

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To check this assumption normal plots were made of all univariate differences. The plots showed no appreciable departures from normality, but a few outliers were detected for V50 and V75. This comes as no surprise, since these variables are known to be unreliable. J a: 14 " ::J all) ..... F,l FIGURE 2: Gamma plot of 1979 squared residuals for uncorrected data. 25 Measurement of Possible Lung Damage to Firefighters at the Mississauga Train Derailment 39 macro (available from the author) was written to produce gamma plots of multivariate residuals from any specified model.

2, Pages 25-43 the analysis. The scale parameter, the test statistics G1 and G2, and their standard errors and the regressions were recalculated, and normal probability plots of the residuals were reexamined. This procedure was continued until the assumption of normality was reasonably well met. 05), the indicator variable was removed from the list of independent variables, and three variables (time spent less than 50 feet from the fire, time spent 50 to 2000 feet from the fire, and time spent more than 2000 feet from the fire) were added to the list of independent variables.

Concerned about the health of the firefighters, police, and other public workers exposed to noxious gases at Mississauga, provincial officials administered lungfunction tests, chest X-rays, and health questionnaires to the affected men. These were administered again one year and two years later. Both Godart and gas-transfer pulmonary-function testing machines were used. Only results from 11 of the 26 lung-function tests which were performed were used for this case study in order to reduce the size of the data set.

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