例17-01计算结果.lst

SAS应用_医学统计学的例题程序及其结果,学习SAS的必备资料.

                                       The SAS System         09:34 Monday, April 1, 2002  69

                                   The LIFETEST Procedure

                              Product-Limit Survival Estimates

                                                 Survival
                                                 Standard     Number      Number
                   T     Survival     Failure      Error      Failed       Left

              0.0000       1.0000           0           0        0          23
              1.0000       0.9565      0.0435      0.0425        1          22
              3.0000       0.9130      0.0870      0.0588        2          21
              5.0000            .           .           .        3          20
              5.0000            .           .           .        4          19
              5.0000       0.7826      0.2174      0.0860        5          18
              6.0000            .           .           .        6          17
              6.0000            .           .           .        7          16
              6.0000       0.6522      0.3478      0.0993        8          15
              7.0000       0.6087      0.3913      0.1018        9          14
              8.0000       0.5652      0.4348      0.1034       10          13
             10.0000            .           .           .       11          12
             10.0000       0.4783      0.5217      0.1042       12          11
             14.0000*           .           .           .       12          10
             17.0000       0.4304      0.5696      0.1041       13           9
             19.0000*           .           .           .       13           8
             20.0000*           .           .           .       13           7
             22.0000*           .           .           .       13           6
             26.0000*           .           .           .       13           5
             31.0000*           .           .           .       13           4
             34.0000       0.3228      0.6772      0.1216       14           3
             34.0000*           .           .           .       14           2
             44.0000       0.1614      0.8386      0.1293       15           1
             59.0000            0      1.0000           0       16           0
                                   * Censored Observation



                           Summary Statistics for Time Variable T

                                     Point     95% Confidence Interval
                       Quantile    Estimate         [Lower, Upper)

                       75%          44.0000     17.0000        59.0000
                       50%          10.0000      6.0000        44.0000
                       25%           6.0000      5.0000        10.0000

                       Mean   24.2277         Standard Error    4.9915


                   Summary of the Number of Censored and Uncensored Values

                             Total     Failed   Censored  %Censored

                                23         16          7    30.4348