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2006 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 11,772,954 1.0136 11,614,990 7 716 .262759793
A 11,799,581 1.0571 11,162,218 7 397 .019794616
A 11,791,841 0.9925 11,880,948 7 254 .015287182
A 11,726,506 0.9767 12,006,252 7 130 .001060095
C 4,323,704 1.3940 3,101,653 11 1,349 .295863533
C 4,011,213 0.9076 4,419,582 9 853 .071985780
C 1,938,560 0.6715 2,886,910 7 342 .717836600
C 3,356,213 1.1843 2,833,921 7 241 .068484384
D3 31,263,235 0.7013 44,578,975 18 3,964 .435334422
Random Totals: 91,983,807   104,485,449 80 8,246  
Catg J Exception Values: 4,511,433   4,441,734      
Catg D1 Exception Values: 33,210,501   31,647,167      
Total Test Values (4): 129,705,741   140,574,350      

Margin of Error

Margin of Error Percent: 10.4842277
Margin of Error Value: 14,738,135

Confidence Interval Values (5)

State Lower Limit: 125,836,215 (State Test Value minus Margin of Error Percent)
Local Test Value: 129,705,741 (Within Confidence Interval)
State Upper Limit: 155,312,485 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 127,700,263 (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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