This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.

# InterquartileRange

 InterquartileRange[list]gives the difference between the upper and lower quartiles for the elements in list. InterquartileRange[dist]gives the difference between the upper and lower quartiles for the symbolic distribution dist.
Interquartile range for a list of exact numbers:
Interquartile range of a symbolic distribution:
Interquartile range for a list of exact numbers:
 Out[1]=

Interquartile range of a symbolic distribution:
 Out[1]=
 Scope   (4)
InterquartileRange works with any real numeric quantities:
Interquartile ranges for columns of a matrix:
Obtain results at any precision:
Compute results for a large vector or matrix:
Compute results for a SparseArray:
 Applications   (1)
InterquartileRange can be used as a check for agreement between data and a distribution:
Generate a random sample:
Find the interquartile range of the data:
Compare with the interquartile range of the distribution:
InterquartileRange is the difference of linearly interpolated Quantile values:
QuartileDeviation is half the interquartile range:
InterquartileRange is the difference between the first and third quartiles:
InterquartileRange requires numeric values: