Table 14.4
Five state 2010 area frame analyses, traditional vs. automatic stratification method
2010 Area frame stratification method comparison
Traditional stratification
Automatic stratification
p-value
Stratum
% Cultivated
Segments
Correct
Accuracy (p
1 )
Segments
Correct
Accuracy(p
2 )
Ha: p
1
6 ¼ p
2
Oklahoma 2010
11
>75%
140
47
33.57%
43
27
62.79%
0.001
12
51%–75%
48
9
18.75%
77
30
38.96%
0.024
20
15%–50%
74
26
35.14%
98
42
42.86%
0.305
40
< 15%
61
61
100.00%
105
96
91.43%
0.027
Total
323
323
Ohio 2010
11
>75%
110
84
76.36%
85
76
89.41%
0.019
12
51%–75%
35
15
42.86%
42
23
54.76%
0.055
20
15%–50%
42
28
66.67%
48
37
77.08%
0.271
40
< 15%
53
47
88.68%
65
57
87.69%
0.869
Total
240
240
Georgia 2010
13
>50%
91
38
41.76%
28
22
78.57%
0.001
20
15%–50%
132
65
49.24%
165
100
60.61%
0.050
40
<15%
90
85
94.44%
120
106
88.33%
0.150
Total
313
313
Virginia 2010
13
>50%
15
8
53.33%
4
2
50.00%
1.000
20
15%–50%
100
50
50.00%
61
31
50.82%
0.920
40
<15%
64
60
93.75%
114
87
76.32%
0.003
Total
179
179
282
C. G. Boryan and Z. Yang