TABLE 3.

Correlation regression analysis for moderately polluted water

Correlation co-efficient r = −0.98, r² = 0.96

95% confidence limits – 1.00 < R < – 0.86

Source	df	Sum of squares	Mean squares		F-Statistic
Regression	1	19769.14	19769.14		115.78
Residuals	5	853.71	170.74
Total	6	20622.85
β co-efficients
Variable	Mean	β co-efficient	95% confidence		Std Error	Partial F-test
			Lower	Upper
Day	21.00	−3.796	−4.49	−3.10	0.35	115.78
Y-intercept		309.86