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2007 Confidence Interval Detail
239/Washington
239-903/Burton ISD

Category Summary

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

Stratum
Variance
A 10,021,124 0.9188 10,906,752 7 270 .017776952
A 9,951,035 0.8945 11,124,690 8 138 .006901684
A 9,995,102 0.9158 10,914,066 7 91 .006627441
A 9,919,255 1.0660 9,305,117 7 51 .011452430
D3 142,290,994 0.9853 144,413,878 33 3,354 .041922061
G1 21,754,258 0.8085 26,906,936 6 35 .084445848
G1 22,228,720 0.9421 23,594,863 5 21 .009038714
G1 21,297,667 0.9117 23,360,389 5 14 .008964389
G1 21,010,060 0.9801 21,436,649 4 9 .001103765
Random Totals: 268,468,215   281,963,340 82 3,983  
Catg J Exception Values: 6,272,623   6,094,981      
Catg D1 Exception Values: 7,465,656   6,707,851      
Total Test Values (4): 282,206,494   294,766,172      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 14,738,309

Confidence Interval Values (5)

State Lower Limit: 280,027,863 (State Test Value minus Margin of Error Percent)
Local Test Value: 282,206,494 (Within Confidence Interval)
State Upper Limit: 309,504,481 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 288,806,593 (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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