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2006 Confidence Interval Detail
228/Trinity
228-903/Trinity ISD

Category Summary

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

Stratum
Variance
A 34,926,446 1.0875 32,116,272 20 1,554 .145574042
A 34,900,373 0.9194 37,959,945 8 736 .006166082
A 34,946,264 0.9918 35,235,193 7 410 .002991056
A 34,848,191 0.9489 36,724,830 7 225 .001295673
C 12,832,169 1.4506 8,846,111 15 3,733 .237802727
C 4,170,219 0.9723 4,289,025 10 916 .515214172
C 7,662,440 0.6945 11,033,031 14 1,188 .740099403
C 8,215,826 1.0035 8,187,171 15 586 .463084524
D3 21,299,320 0.9441 22,560,449 15 1,689 .371997147
F1 4,414,744 0.8741 5,050,617 7 120 .119841712
F1 4,422,768 0.7714 5,733,430 6 43 .123122124
F1 4,610,710 0.8476 5,439,724 5 17 .003128765
F1 4,023,457 0.8894 4,523,788 3 6 .051524936
L1 3,557,135 0.9533 3,731,391 7 106 .014631309
L1 3,485,078 1.0172 3,426,148 5 15 .070809506
L1 3,527,489 1.0029 3,517,289 2 5 .000020526
Random Totals: 221,842,629   228,374,414 146 11,349  
Catg J Exception Values: 7,810,207   7,650,729      
Catg D1 Exception Values: 12,064,111   2,115,154      
Catg L1 Exception Values: 2,800,952   2,916,035      
Total Test Values (4): 244,517,899   241,056,332      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 12,052,817

Confidence Interval Values (5)

State Lower Limit: 229,003,515 (State Test Value minus Margin of Error Percent)
Local Test Value: 244,517,899 (Within Confidence Interval)
State Upper Limit: 253,109,149 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 215,930,467 (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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