Table 4.1a          Summary of the Results of ANOVA (Dissolved Oxygen, surface & middle depth)

Dissolved Oxygen, surface & middle depth

Sample Size

Degree of Freedom

F-value

P-value

Case 1

429

35

1.1530

0.2577

Case 2

162

26

1.2291

0.2229

Case 3

144

11

0.2497

0.9930

Case 4

54

8

0.0282

1