CASE STUDIES IN BIOMETRY: Chapter 7. Survival Analysis for Size Regulation of Atlantic Halibut Stephen J. Smith, Ken G. Waiwood, John D.Neilson The file ch7.dat contains the following variables: No - observation number (1,...,294). TIME - survival time of halibut (time until death) in minutes. CENSOR - censoring indicator. 1=uncensored observation; 0=censored observation. TOWD - duration (in minutes) of time trawl net was towed on the bottom. DELDEPTH - difference between maximum and minimum depth observed during tow (depth measured in meters). LENGTH - fork length of halibut in centimeters. HANDTIME - handling time (in minutes) between net coming on board vessel and fish being placed in holding tanks. LOGCAT - natural logarithm of total catch of fish in tow.