Levene's Test for Equality of Variances t-test for Equality of Means   F Sig. t df Sig. (2-tailed) Cd ug/gmEqual variances assumed 24.951 .000 3.825 97 .000 Equal variances not assumed     6.580 74.148 .000

Table 5: Result of Independent Sample T-Test for Cadmium Concentration