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INTERQUARTILE RANGEName:
That is, it is the difference betweeen the 75th and 25th percentiles of a variable. The interquartile range is used as a robust measure of scale. That is, it is an alternative to the standard deviation. The interquartile range is less effected by extremes than the standard deviation. It is the measure of scale used by the box plot.
<SUBSET/EXCEPT/FOR qualification> where <y> is the response variable; <par> is a parameter where the computed interquartile range is stored; and where the <SUBSET/EXCEPT/FOR qualification> is optional.
LET A = INTERQUARTILE RANGE Y1 SUBSET TAG > 2
LET A1 = INTERQUARTILE RANGE Y1
READ GEAR.DAT DIAMETER BATCH TITLE AUTOMATIC XLIMITS 1 10 MAJOR XTIC MARK NUMBER 10 MINOR XTIC MARK NUMBER 0 XTIC OFFSET 1 1 X1LABEL BATCH Y1LABEL INTERQUARTILE RANGE OF DIAMETER IQ RANGE PLOT DIAMETER BATCH
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Date created: 10/05/2001 |