Time Series Modeling - Water Quality Management: Assessment and Interpretation - page 69

Table 4.5 (continued)
Na +

Cl

Ca þþ Mg þþ

AR Lag1 0.9873 0.70071 0.84247 0.955

T 17.4556 16.7293 14.524 16.483

Prob > lTl <.0001 <.0001 <.0001 <.0001

AR Lag2 − 0.2285 . − 0.1425 − 0.2356

T 4.0145 . 2.455 4.0563

− − −

Prob > lTl <.0001 . 0.014 <.0001

MA1 . . . 0.9954

T . . . 23.236

Prob > lTl . . . <.0001

SAR
Lag12

. . . 0.1499

T . . . 2.53
Prob > lTl . . . 0.0117
P-value 0.99 0.99 0.99 0.95
RV 0.2704 1.297 0.081 10353
ME E E E E
LSW Level smoothing weight, SL Smoothed level, AR Autoregressive, SAR Seasonal autoregressive, MA Moving average, RV Residual variance (sigma
squared), ME Model evaluation, E Excellent, SBC Schwartz Bayesian information criteria, AIC Akaike information criteria, Cl Chloride ion, HCO 3
Biocarbonate ion, SO 4 Sulfate ion; Ca þþ Calcium ion; Mg þþ = Magnesium ion, Na þ Sodium ion, TDS Total dissolved solids, Std. Error Standard deviation