Temporal Aspects of Surface Water Quality Variation Using Robust Statistical Tools

Table 5

Estimates of coefficient of the model (dry season) of parameters in mg/L except for temperature, conductivity, and pH.

	Beta unstandardized coefficient	Std. error	Beta standardized coefficient	𝑡-value	𝑃 value
(Constant)	62.793	6.003		10.459	0.000
DO	4.184	0.191	0.539	21.878	0.000
COD	−0.427	0.034	−0.423	−12.645	0.000
SS	−0.076	0.015	−0.097	−4.958	0.000
NH3	−1.529	0.292	−0.184	−5.244	0.000
Temperature	0.629	0.175	0.079	3.595	0.001
pH	−1.266	0.492	−0.050	−2.571	0.012
Conductivity	0	0	−0.052	−2.491	0.015

𝑅 = 0.988; 𝑅² = 0.976; Adj. 𝑅² = 0.973.