
   ========================================
   COMPARE2 Version 2.69
   Tuesday, 22nd May 2012, 12:39.
   ========================================

   -----------------------------------------
   Power of test for difference beween means
   -----------------------------------------
   DATA:
   Significance level = 5% (2-sided), 2.5% (1-sided).
   Sample sizes: A, 38;  B, 38
   Pooled variance: 16
   Difference to be detected:  3

   RESULTS:

   POWER = 89.74%



   ========================================
   COMPARE2 Version 2.69
   Tuesday, 3rd December 2013, 15:21.
   ========================================

   -----------------------------------------
   Power of test for difference beween means
   -----------------------------------------
   DATA:
   Significance level = 5% (2-sided), 2.5% (1-sided).
   Sample sizes: A, 38;  B, 38
   Pooled variance: 16
   Difference to be detected:  4

   RESULTS:

   POWER = 99.04%


   --------------------

   DATA:
   Significance level = 5% (2-sided), 2.5% (1-sided).
   Sample sizes: A, 38;  B, 38
   Pooled variance: 16
   Difference to be detected:  3

   RESULTS:

   POWER = 89.74%


   ----------------------------------------------
   Sample sizes required for testing a difference
   ----------------------------------------------
   DATA:
   Difference between means
   Significance level = 5%   Power = 80%   Ratio A:B = 1
   Pooled variance = 16       Difference = 3

   RESULTS:
   REQUIRED SAMPLE:      Total 58  (29 in A, 29 in B)

   EXPECTED PRECISION:
   Approx. 95% CI for difference between means (D) = 
                         D - 2.108  to  D + 2.108



   ========================================
   COMPARE2 Version 2.69
   Thursday, 19th November 2015, 14:32.
   ========================================

   ----------------------------------------------
   Sample sizes required for testing a difference
   ----------------------------------------------
   DATA:
   Difference between means
   Significance level = 5%   Power = 80%   Ratio A:B = 1
   Pooled variance = 16       Difference = 3

   RESULTS:
   REQUIRED SAMPLE:      Total 58  (29 in A, 29 in B)

   EXPECTED PRECISION:
   Approx. 95% CI for difference between means (D) = 
                         D - 2.108  to  D + 2.108


