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2007 Confidence Interval Detail
228/Trinity
228-901/Groveton ISD

Category Summary

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

Stratum
Variance
A 12,370,059 1.0078 12,274,319 15 711 .226962414
A 12,372,061 0.7937 15,587,830 17 391 .091939333
A 12,356,624 0.9177 13,464,775 19 250 .033842781
A 12,336,120 1.0358 11,909,751 18 127 .075144099
C 4,375,501 1.0110 4,327,894 15 1,363 .076665251
C 3,961,681 0.9879 4,010,204 18 840 .012920372
C 1,802,428 1.0591 1,701,849 17 322 .107647458
C 3,361,032 1.0625 3,163,324 19 252 .018347067
D3 32,628,568 0.5919 55,125,136 19 4,009 .326564900
Random Totals: 95,564,074   121,565,082 157 8,265  
Catg J Exception Values: 4,982,287   4,987,585      
Catg D1 Exception Values: 29,384,008   28,687,537      
Total Test Values (4): 129,930,369   155,240,204      

Margin of Error

Margin of Error Percent: 9.4825751
Margin of Error Value: 14,720,769

Confidence Interval Values (5)

Local Test Value: 129,930,369 (Outside Confidence Interval)
State Lower Limit: 140,519,435 (State Test Value minus Margin of Error Percent)
State Upper Limit: 169,960,973 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 131,008,407 (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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