Environment for creative processing of text and numerical data

Comparing the means of two given samples

Beginning status (before activation):

   1 *
   2 *Continued from previous example, now straight from data:
   3 *
   4 *DATA D1: 13 7 10 9 10 9 12 9 7 8 END
   5 *DATA D2: 12 10 15 9 12 11 11 10 13 10 10 9 12 10 9 END
   6 *
   7 *COMPARE D1,D2,CUR+1  
   8 *

Ending status (after activation):

   1 *
   2 *Continued from previous example, now straight from data:
   3 *
   4 *DATA D1: 13 7 10 9 10 9 12 9 7 8 END
   5 *DATA D2: 12 10 15 9 12 11 11 10 13 10 10 9 12 10 9 END
   6 *
   7 *COMPARE D1,D2,CUR+1  
   8 *Independent samples           D1(D1)              D2(D2)
   9 *Sample size                   10                  15
  10 *Mean                           9.400000            10.86667
  11 *Standard deviation             1.955050            1.684665
  12 *Student's t=-2.001 df=23 (P=0.0287 one-sided test)
  13 *Sum of ranks (R)              95.5                229.5
  14 *Mann-Whitney (U)              40.5                109.5
  15 *(P=0.0278 one-sided Mann-Whitney, normal approximation)
  16 *Critical levels by simulation:
  17 *               Mean    R or U
  18 *Critical level 0.03400 0.02410  N=100000
  19 *Standard error 0.00057 0.00048
  20 *

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