Agriculture Reference
In-Depth Information
Coefficients
SE
t Stat
P-value
LB95%
UB 95%
Intercept
74.654
49.072
1.521
0.138
174.492
25.183
X7
0.692
2.582
0.268
0.790
4.561
5.944
78.138
2.112
153.401
2.876
X12
36.993
0.042
X11
73.051
9.554
7.646
0.000
53.614
92.489
Step 4: Include X10 and drop X7
SUMMARY OUTPUT
Regression Statistics
R
0.99
R Sqr
0.99
Adj R Sqr
0.98
SE
8.14
Obs
37.00
ANOVA
df
SS
MS
F
Significance F
Regression
3.00
149591.99
49864.00
752.63
0.00
Residual
33.00
2186.36
66.25
Total
36.00 151778.35
Coefficients
SE
t Stat
P-value
LB95%
UB 95%
Intercept
400.194
23.421
17.087
0.000
447.843
352.544
X10
2.510
0.150
16.688
0.000
2.204
2.816
X12
16.500
12.605
1.309
0.200
42.145
9.144
X11
55.650
3.115
17.867
0.000
49.313
61.986
Step 5: Include X13 and drop X12
SUMMARY OUTPUT
Regression Statistics
R
0.993
R Sqr
0.987
Adj R Sqr
0.986
SE
7.806
Obs
37.00
ANOVA
df
SS
MS
F
Significance F
Regression
3
149767.55
49922.52
819.30
0.00
Residual
33
2010.79
60.93
Total
36
151778.35
Coefficients
SE
t Stat
P-value
LB95%
UB 95%
Intercept
425.760
20.502
20.766
0.000
467.472
384.047
X13
0.109
0.050
2.178
0.037
0.210
0.007
X10
2.735
0.158
17.319
0.000
2.414
3.056
X11
53.104
1.376
38.581
0.000
50.304
55.904
Step 6: Include X1
Regression Statistics
R
0.994
R Sqr
0.988
Adj R Sqr
0.986
SE
7.67
Obs
37.00
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