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2009 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 37,678,479 0.6670 56,489,474 17 1,580 .335103293
A 38,348,452 0.7227 53,062,754 22 725 .087157564
A 38,408,366 0.7697 49,900,437 15 407 .015398620
A 40,510,051 0.8302 48,795,532 17 232 .035260920
C 9,249,092 1.0651 8,683,778 19 3,336 .113657897
C 8,749,603 0.7356 11,894,512 24 2,051 .744389160
C 10,194,895 0.9157 11,133,444 17 1,038 .188022779
C 7,321,381 0.9453 7,745,034 16 262 .020748229
D3 28,761,945 1.0004 28,750,445 21 1,712 .029139646
F1 4,542,060 0.5969 7,609,415 16 113 .929369612
F1 3,737,825 0.7587 4,926,618 14 34 .193004465
F1 5,512,991 0.7469 7,381,163 9 17 .168924161
F1 4,233,722 0.8119 5,214,586 5 6 .034278927
L1 3,458,226 1.0016 3,452,702 15 88 .003715159
L1 6,739,615 1.0145 6,643,287 12 15 .003429097
Random Totals: 247,446,703   311,683,181 239 11,616  
Catg J Exception Values: 8,993,370   9,248,052      
Catg D1 Exception Values: 8,274,290   7,797,253      
Total Test Values (4): 264,714,363   328,728,486      

Margin of Error

Margin of Error Percent: 5.6885067
Margin of Error Value: 18,699,742

Confidence Interval Values (5)

Local Test Value: 264,714,363 (Outside Confidence Interval)
State Lower Limit: 310,028,744 (State Test Value minus Margin of Error Percent)
State Upper Limit: 347,428,228 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 281,510,511 (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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