Posted by Linda on Saturday, April 13, 2013 at 2:31pm.
All the following are measures of variability or dispersion within a set of data except?
range, median, standard deviation, variance

stats.  li, Saturday, April 13, 2013 at 4:23pm
i think its median because
By far the most commonly used measures of dispersion in the social sciences are variance and standard deviation.The range is the simplest measure of dispersion. 
stats.  PsyDAG, Sunday, April 14, 2013 at 2:14pm
Median is measure of central tendency.