This work presents a comparison of results about the accuracy of statistical routines from four statistical software packages that are freely used: Octave, academic Ox, Python, and R. Having extensive functional libraries for statistical computing with applications in image processing, these software packages are useful for data analysis and visualization. The National Institute of Standards and Technology datasets and McCullough’s methodology are used for assessing these packages. As to the statistical analysis herein performed, R yielded the best results and had the most comprehensive library.