CASE STUDIES IN BIOMETRY: Chapter 3. Prediction Models for Personal Ozone Exposure Assessment David Wypij and L.-J. Sally Liu The file ch3b.dat includes the personal ozone exposure data. The variables are: 1. Subject identification number, ranging from 1 to 23, 2. Date, in MM/DD/YY format, 3. Home region, ranging from 1 to 6, 4. 12-hour average daytime personal ozone concentration, Y, 5. 12-hour average daytime continuous ozone concentration at the DC stationary site, X , 1 6. 12-hour average nighttime continuous ozone concentration at the NC stationary site, X , 1 O 7. 24-hour average home outdoor passive ozone concentration, X , 1 DI 8. 12-hour average home indoor daytime passive ozone concentration, X , 1 NI 9. 12-hour average home indoor nighttime passive ozone concentration, X , 1 10. Prediction values for a 12-hour microenvironmental model based H on hourly ozone concentrations, X , 2 O 11. Fraction of time spent anywhere outdoors, X , 3 I 12. Fraction of time spent at home indoors, X , and 3 13. Indicator variable for whether the child stayed near the S home for the whole day, X , where 1 = yes, 0 = no. 3 All ozone measurements are given in units of ppb. Missing values are encoded as periods.