Sum of Squares df Mean Square F Sig. Between Groups 3.721 5 7.442 2.969 .017* Within Groups 1.955 78 2.507     Total 2.327 83       *The mean difference is significant at the 0.05 level.

Table 2: ANOVA test for the mean values of NAF of different gossypol concentrations and control cells at 6 hours post treatment.