Reanalysis of some baboon descent data

Wagner and Altmann [1973] recently reported an analysis of a set of baboon descent times, some of which were left censored due to varying arrival times at the observation site. Any transformation of the data which reverses order produced a set of right censored observations. In this way, the Kaplan-Meier [1958] estimate of the descent time distribution can be computed. Estimates of the mean and variance of the distribution are given, as well as the standard error of the estimate of the mean.