Table 4:
Analysis of variance (
F
-Test ).
Zn
2+
(ppm)
Source of variance
Sum of squares
Degrees of freedom
Mean square
F
Level of significance of
F
25
Between
180
1
180
0.56
P
< 0.05
Within
2560
8
320
50
Between
532
1
532
3.82
P
< 0.05
Within
1115
8
139