libstatistics-basic-perl 1.6601-1 (amd64 binary) in ubuntu precise

 Statistics::Basic is a collection of very basic statistics
 modules. It includes modules to find the correlation between two
 arrays, find the covariance between two arrays, find the least square
 fit for two arrays, find the mean of an array, find the median of an
 array, find the mode of an array, find the standard deviation of an
 array, and find the variance of an array.