Environmental Engineering Reference
In-Depth Information
Table 4.6 (continued)
Na
+
Cl
Ca
þþ
Mg
þþ
Prob > lTl
0.017
.
0.03
.
P-Value
0.98
0.99
0.97
0.99
RV
0.0314
0.1099
0.0925
0.0248
ME
E
E
E
E
HCO
3
SO
4
pH
TDS
Suggested
Model
ARIMA(1,0,1)(0,0,0)
ARIMA(2,0,0)(1,0,0)
ARIMA(2,0,0)(0,0,0)
ARIMA(1,0,1)(0,0,0)
Equation
Z
t
= 2.45 + 0.628(Z
t
−
1
)+a
t
+ 0.584
(a
t
−
1
)
Z
t
= 0.88 + (0.997(Z
t
−
1
)
−
0.381
(Z
t
−
2
). + a
t
)x(0.2076(Z
t
−
12
)+
ʵ
t
)
Z
t
= 7.775 + 0.842(Z
t
−
1
)
−
0.142(Z
t
−
2
)+a
t
Z
t
= 228.8 + 0.8(Z
t
−
1
)+a
t
+ 0.591(a
t
−
1
)
AIC
141.02
98.25
63.13
2826.91
−
SBC
152.07
83.51
74.24
2837.96
−
R-Square
0.94
0.53
0.83
0.91
Std. Error
0.305
0.2028
0.267
29.366
Intercept
2.455
0.8803
7.799
228.79
T
32.611
22.965
181.058
16.904
Prob > lTl
<.0001
<.0001
<.0001
<.0001
AR Lag1
0.6279
0.9967
0.7692
0.801
T
12.273
18.302
13.371
21.822
Prob > lTl
<.0001
<.0001
<.0001
<.0001
AR Lag2
0.3812
0.1255
-
−
−
-
T
6.935
2.183
-
−
−
-
Prob > lTl
-
<.0001
0.0297
-
MA1
0.584
.
0.591
−
-
−
Search WWH ::
Custom Search