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2009 Confidence Interval Detail
246/Williamson
246-905/Granger ISD

Category Summary

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

Stratum
Variance
A 11,765,802 0.9840 11,957,116 14 254 .020261590
A 9,837,626 0.8928 11,018,846 14 129 .015171540
A 11,414,448 0.9079 12,572,363 12 103 .021133032
A 9,468,490 1.0094 9,380,315 11 45 .012778713
D3 36,370,852 0.9969 36,483,952 25 1,580 .013455186
F1 1,788,843 0.9694 1,845,309 6 26 .016790130
F1 1,364,686 0.9854 1,384,906 5 11 .004055659
F1 1,727,297 0.9375 1,842,450 4 8 .004806686
F1 2,020,897 1.0985 1,839,688 3 5 .030254102
Random Totals: 85,758,941   88,324,945 94 2,161  
Catg J Exception Values: 5,910,989   6,021,490      
Catg D1 Exception Values: 15,652,147   11,969,983      
Total Test Values (4): 107,322,077   106,316,418      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 5,315,821

Confidence Interval Values (5)

State Lower Limit: 101,000,597 (State Test Value minus Margin of Error Percent)
Local Test Value: 107,322,077 (Within Confidence Interval)
State Upper Limit: 111,632,239 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 98,625,914 (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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