
DIFFERENCE OF SD OF THE MEANName:
with s and n denoting the standard deviation and the number of observations, respectively. For the differeence of standard deviation of the means, the standard deviation of the mean is computed for each of two samples then their difference is taken.
<SUBSET/EXCEPT/FOR qualification> where <y1> is the first response variable; <y2> is the first response variable; <par> is a parameter where the computed difference of the sd of the means is stored; and where the <SUBSET/EXCEPT/FOR qualification> is optional.
LET A = DIFFERENCE OF SD OF THE MEAN Y1 Y2 SUBSET X > 1
SKIP 25 READ IRIS.DAT Y1 TO Y4 X . LET A = DIFFERENCE OF SD OF THE MEAN Y1 Y2 TABULATE DIFFERENCE OF SD OF THE MEAN Y1 Y2 X . XTIC OFFSET 0.2 0.2 X1LABEL GROUP ID Y1LABEL DIFFERENCE OF SD OF THE MEAN CHAR X LINE BLANK DIFFERENCE OF SD OF THE MEAN PLOT Y1 Y2 X CHAR X ALL LINE BLANK ALL BOOTSTRAP DIFFERENCE OF SD OF THE MEAN PLOT Y1 Y2 XDataplot generated the following output. ************************************************** ** LET A = DIFFERENCE OF SD OF THE MEAN Y1 Y2 ** ************************************************** THE COMPUTED VALUE OF THE CONSTANT A = 0.32022983E01 ***************************************************** ** TABULATE DIFFERENCE OF SD OF THE MEAN Y1 Y2 X ** ***************************************************** * Y1 AND Y2 X * DIFFERENCE OF SD OF THE MEAN ********************************************** 1.00000 * 0.375823E02 2.00000 * 0.286198E01 3.00000 * 0.443190E01 GROUPID AND STATISTIC WRITTEN TO FILE DPST1F.DAT  
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Date created: 03/27/2003 