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2012 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 48,805,024 0.9550 51,104,737 14 1,419 .021463489
A 52,705,528 0.9197 57,307,305 10 689 .021013265
A 52,132,099 0.9561 54,525,781 8 412 .004301686
A 57,718,622 0.9442 61,129,657 10 250 .010378977
C 5,499,172 0.9840 5,588,589 15 2,145 .038474442
C 10,756,924 1.0432 10,311,469 15 2,645 .012256284
C 10,497,014 1.0857 9,668,430 19 1,202 .034189519
C 9,556,116 1.0001 9,555,160 15 309 .006032130
D3 27,181,441 0.8981 30,265,495 20 1,048 .112883003
F1 4,123,482 0.8276 4,982,458 12 81 .079590884
F1 8,516,077 0.6862 12,410,488 10 60 .120299748
F1 5,472,195 0.8090 6,764,147 5 14 .185065975
F1 9,403,731 0.8449 11,129,993 4 9 .015391653
Random Totals: 302,367,425   324,743,709 157 10,283  
Catg D1 Exception Values: 6,237,479   5,705,715      
Total Test Values (4): 308,604,904   330,449,424      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 16,522,471

Confidence Interval Values (5)

Local Test Value: 308,604,904 (Outside Confidence Interval)
State Lower Limit: 313,926,953 (State Test Value minus Margin of Error Percent)
State Upper Limit: 346,971,895 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 309,315,965 (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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