The differences between the ceramic specimens obtained using
eight different mixtures and control sample (I) were determined
according to the nonparametric tests of KruskaleWallis and the
median test, followed by a multiple comparison test of classes for
all the mixtures. The test of multiple comparisons is a complement
to KruskaleWallis and it points out the mixtures that differ. The
significance level in these tests was 5%.
All tests were conducted using the software Statistica 6.1®. The
results are presented as box and whisker graphs in order to visualize
the behavior and variability of the data in relation to the
temperatures tested.