Levene's Test for Equality of Variances t-test for Equality of Means   F Sig. t df Sig. (2-tailed) Cu ug/gm Equal variances assumed 13.995 .000 2.833 98 .006 Equal variances not assumed     4.726 86.565 .000

Table 6: Result of Independent Sample T-Test for Cadmium Concentration