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2009 Confidence Interval Detail
072/Erath
072-903/Stephenville ISD

Category Summary

(1)
Category
(1)
Local
Value
(1)
Stratum
Ratio
(1)
State
Value
(2)
Sample
Size
(3)
Total
Parcels

Stratum
Variance
A 123,733,260 0.9058 136,601,082 35 1,957 .026199721
A 124,615,370 0.9293 134,095,954 38 1,199 .008631311
A 127,373,620 0.9913 128,491,496 29 904 .008669303
A 131,488,900 0.9429 139,451,586 18 543 .010635172
B 18,163,200 1.0222 17,768,734 11 150 .004188922
B 14,565,110 0.9678 15,049,711 9 26 .005169193
B 14,028,220 1.0327 13,584,022 5 8 .002790446
D3 210,968,540 1.0322 204,387,270 33 4,494 .054038724
F1 55,799,950 0.9755 57,201,384 15 346 .013505210
F1 55,976,620 1.0169 55,046,337 17 126 .009210125
F1 55,290,630 1.0076 54,873,591 14 48 .004715722
F1 48,255,000 1.0077 47,886,276 8 12 .002798788
L1 21,276,740 1.0086 21,095,320 7 382 .001708990
L1 23,189,610 1.0074 23,019,267 10 103 .007733142
L1 22,538,760 1.0109 22,295,736 6 33 .000493659
L1 29,227,000 1.0181 28,707,396 4 14 .000197322
Random Totals: 1,076,490,530   1,099,555,162 259 10,345  
Catg D1 Exception Values: 14,277,350   12,545,487      
Catg B Exception Values: 12,413,850   12,297,084      
Total Test Values (4): 1,103,181,730   1,124,397,733      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 56,219,887

Confidence Interval Values (5)

State Lower Limit: 1,068,177,846 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,103,181,730 (Within Confidence Interval)
State Upper Limit: 1,180,617,620 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,245,814,257 (See ISD Summary Worksheet)

Sources:
(1) See Stratified Category Worksheet Reports PTS236, PTS430
(2) Number of parcels sampled by staff
(3) Total Category Parcels from Stratification Report, Appraisal Roll, or Self-report
(4) Includes any parcels in A, B, C, D3, F1, G1, G2, or L1 marked as exception properties
(5) Unstudied categories and sub-categories were not included in the Confidence Interval Values
(6) Includes local value of unstudied property categories and sub-categories

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