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2011 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 12,526,943 0.7279 17,209,703 11 633 .197041630
A 14,274,508 0.8966 15,920,709 10 366 .101185352
A 19,806,910 1.0133 19,546,936 11 312 .145368458
A 23,974,424 1.0018 23,931,348 11 181 .061224114
C 4,285,643 0.9212 4,652,239 11 1,339 .222273163
C 3,976,912 1.1411 3,485,156 10 837 .033458094
C 2,304,978 0.9207 2,503,506 9 382 .024798269
C 13,214,815 0.8168 16,178,765 13 310 .093464016
D3 41,958,751 0.8999 46,626,015 21 3,663 .158747544
Random Totals: 136,323,884   150,054,377 107 8,023  
Catg J Exception Values: 34,246,090   31,579,585      
Catg D1 Exception Values: 29,237,065   28,238,851      
Total Test Values (4): 199,807,039   209,872,813      

Margin of Error

Margin of Error Percent: 5.5317184
Margin of Error Value: 11,609,573

Confidence Interval Values (5)

State Lower Limit: 198,263,240 (State Test Value minus Margin of Error Percent)
Local Test Value: 199,807,039 (Within Confidence Interval)
State Upper Limit: 221,482,386 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 235,428,570 (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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