
128 Nonparametric Statistics for Social and Behavioral Sciences
size based on Cohen’s estimates. The sign of r provides no useful informa-
tion, so one would report the absolute value.
Students in the general algebra course had a higher median score (77.00)
than those in the pre-college algebra course (62.50). The median score for
students in the technical algebra course was 71.00. The principal and teach-
ers may make advisement and curricular decisions based on these results or
continue analyzing similar data to conrm these ndings.
One advantage of the Kruskal-Wallis test over the median test is that the
Kruskal-Wallis test uses more informat ...