Research Article

Simultaneous Determination of Ternary Mixture of Carboxin, Chlorpyrifos, and Tebuconazole Residues in Cabbage Samples Using Three Spectrophotometric Methods

Table 8

Presence of other pesticides.

t-and F-tests: Two-sample assuming unequal variances at 0.05 significance level
PesticideTebuconazoleCarboxinChlorpyrifos

Mean13.91749596218.255712.953221.810413.8493
Variance143.9883651189303.6798180.9091385.3132187.4866
Sample size11201320720
Degree of freedom14216
Separate variance t-test statistic1.07210.93150.9247
t critical two-tail2.14482.07962.4469
value0.30180.36220.3908
F-test2.28121.67862.0721
F critical value2.37792.30802.7401
value0.05850.15140.1140