A COEFFICIENT OF VARIABILITY
DOI : 10.3844/jmssp.2013.62.64
Journal of Mathematics and Statistics
Volume 9, 2013
A coefficient of variability is described. It is shown that conducting all possible paired comparisons in a group of scores, the investigator can ascertain the groups degree of variability as well as its converse, the groups degree of homogeneity. The coefficient, useful in determining whether to divide a class into subgroups for the purpose of instruction, has the advantage that it is in the form of a proportion and that it thus provides a common ground for comparison of variability across measures.
© 2013 Manuel Martinez-Pons. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.