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DIFFERENCE OF INTERQUARTILE RANGEName:
That is, it is the difference betweeen the 75th and 25th percentiles of a variable. The normalized interquartile range is
This normalization is based on the fact that for a normal distribution, the interquartile range is approximately 1.349 times the standard deviation. For the differeence of interquartile ranges, the interquartile range 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 interquartile ranges is stored; and where the <SUBSET/EXCEPT/FOR qualification> is optional.
<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 normalized interquartile ranges is stored; and where the <SUBSET/EXCEPT/FOR qualification> is optional.
LET A = DIFFERENCE OF INTERQUARTILE RANGE Y1 Y2 SUBSET X > 1 LET A = DIFFERENCE OF NORMALIZED INTERQUARTILE RANGE Y1 Y2
IQR is a synonym for INTERQUARTILE RANGE SCALED is a synonym for NORMALIZED The word OF is optional
2016/02: Added NORMALIZED INTERQUARTILE RANGE SKIP 25 READ IRIS.DAT Y1 TO Y4 X . LET A = DIFFERENCE OF INTERQUARTILE RANGE Y1 Y2 TABULATE DIFFERENCE OF INTERQUARTILE RANGE Y1 Y2 X . XTIC OFFSET 0.2 0.2 X1LABEL GROUP ID Y1LABEL DIFFERENCE OF IQ RANGES CHAR X LINE BLANK DIFFERENCE OF INTERQUARTILE RANGE PLOT Y1 Y2 X CHAR X ALL LINE BLANK ALL BOOTSTRAP DIFFERENCE OF INTERQUARTILE RANGE PLOT Y1 Y2 XDataplot generated the following output. ******************************************** ** LET A = DIFFERENCE OF IQ RANGE Y1 Y2 ** ******************************************** THE COMPUTED VALUE OF THE CONSTANT A = 0.72499990E+00 *********************************************** ** TABULATE DIFFERENCE OF IQ RANGE Y1 Y2 X ** *********************************************** * Y1 AND Y2 X * DIFFERENCE OF INTERQUARTILE RA ********************************************** 1.00000 * -0.175001 2.00000 * 0.200000 3.00000 * 0.450000 GROUP-ID AND STATISTIC WRITTEN TO FILE DPST1F.DAT
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Date created: 03/27/2003 |