When the F test was conducted at a significance level of 5%,
there were significant differences found when different solvents
were used. There were no significant differences for the T factor
and the first order interaction T S because the p-value was less
than 5%. After it was determined that there was a significant difference, it was of interest to evaluate the magnitudes of these differences, using the Tukey test at a 5% significance level. The results
are presented in Table 4