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2008 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 12,634,889 0.7584 16,659,927 16 726 .297364931
A 12,456,562 0.7152 17,416,893 16 386 .243665299
A 12,267,541 0.6101 20,107,427 19 249 .070525260
A 13,684,272 0.6435 21,265,380 18 143 .052050954
C 4,418,615 0.7417 5,957,415 16 1,361 .409240867
C 4,222,413 0.7151 5,904,647 20 889 .587246375
C 1,844,549 0.7715 2,390,861 19 326 .361128633
C 3,712,970 0.8513 4,361,529 16 269 .060104400
D3 49,045,473 1.0491 46,750,046 44 4,091 .850207087
Random Totals: 114,287,284   140,814,125 184 8,440  
Catg J Exception Values: 5,430,674   5,813,021      
Catg D1 Exception Values: 28,025,332   40,935,978      
Total Test Values (4): 147,743,290   187,563,124      

Margin of Error

Margin of Error Percent: 7.8092994
Margin of Error Value: 14,647,366

Confidence Interval Values (5)

Local Test Value: 147,743,290 (Outside Confidence Interval)
State Lower Limit: 172,915,758 (State Test Value minus Margin of Error Percent)
State Upper Limit: 202,210,490 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 180,830,063 (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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