
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. 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. The NORMALIZED INTERQUARTILE RANGE command returns the normalized interquartile range.
<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.
<SUBSET/EXCEPT/FOR qualification> where <y> is the response variable; <par> is a parameter where the computed normalized interquartile range is stored; and where the <SUBSET/EXCEPT/FOR qualification> is optional.
LET A = INTERQUARTILE RANGE Y1 SUBSET TAG > 2 LET A = NORMALIZED INTERQUARTILE RANGE Y1
IQR is a synonym for INTERQUARTILE RANGE. NORMALIZED IQ RANGE is a synonym for NORMALIZED INTERQUARTILE RANGE. NORMALIZED IQR is a synonym for NORMALZIED INTERQUARTILE RANGE. SCALED INTERQUARTILE RANGE is a synonym for NORMALIZED INTERQUARTILE RANGE. SCALED INTER QUARTILE RANGE is a synonym for NORMALIZED INTERQUARTILE RANGE. SCALED IQ RANGE is a synonym for NORMALIZED INTERQUARTILE RANGE. SCALED IQR is a synonym for NORMALZIED INTERQUARTILE RANGE.
LET A1 = INTERQUARTILE RANGE Y1  
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Date created: 10/05/2001 