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2006 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 9,145,010 0.9593 9,533,003 7 269 .015493188
A 9,133,311 0.8899 10,263,300 7 139 .006823314
A 9,069,490 0.8666 10,465,601 9 92 .028901225
A 9,093,610 0.9539 9,533,085 6 53 .016023338
D3 128,942,291 0.8291 155,520,795 24 2,722 .149785559
G1 22,936,582 1.0101 22,707,239 6 35 .013168212
G1 22,324,120 1.0336 21,598,413 5 18 .005547897
G1 21,765,650 1.0064 21,627,236 5 14 .009322202
G1 21,903,030 1.0053 21,787,556 4 10 .009021291
Random Totals: 254,313,094   283,036,228 73 3,352  
Catg J Exception Values: 5,859,287   6,557,888      
Catg D1 Exception Values: 7,427,634   7,004,588      
Total Test Values (4): 267,600,015   296,598,704      

Margin of Error

Margin of Error Percent: 8.3189902
Margin of Error Value: 24,674,017

Confidence Interval Values (5)

Local Test Value: 267,600,015 (Outside Confidence Interval)
State Lower Limit: 271,924,687 (State Test Value minus Margin of Error Percent)
State Upper Limit: 321,272,721 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 279,882,872 (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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