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2009 Confidence Interval Detail
217/Stonewall
217-901/Aspermont CISD

Category Summary

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

Stratum
Variance
A 2,433,166 1.1656 2,087,479 8 205 .156180714
A 2,714,580 0.9234 2,939,766 7 117 .140295627
A 2,749,300 1.0412 2,640,511 8 79 .128255959
A 2,764,270 1.0535 2,623,892 7 43 .017335815
D3 10,557,183 0.7406 14,254,905 21 3,056 .125745246
G1 19,779,570 1.0442 18,942,319 6 63 .007298864
G1 20,229,739 0.9920 20,392,882 6 25 .005536279
G1 20,019,558 1.0138 19,747,049 5 11 .008727805
G1 18,679,069 1.0641 17,553,866 3 5 .004341125
Random Totals: 99,926,435   101,182,669 71 3,604  
Catg J Exception Values: 3,548,139   3,078,131      
Catg D1 Exception Values: 25,818,480   22,130,282      
Catg G1 Exception Values: 22,526,470   21,898,314      
Total Test Values (4): 151,819,524   148,289,396      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 7,414,470

Confidence Interval Values (5)

State Lower Limit: 140,874,926 (State Test Value minus Margin of Error Percent)
Local Test Value: 151,819,524 (Within Confidence Interval)
State Upper Limit: 155,703,866 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 170,401,007 (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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