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2009 Confidence Interval Detail
044/Collingsworth
044-902/Wellington ISD

Category Summary

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

Stratum
Variance
A 8,739,870 0.8594 10,169,735 14 474 .041573855
A 8,500,790 0.9365 9,077,192 15 198 .015154635
A 8,441,350 0.9568 8,822,481 15 127 .003430570
A 8,361,710 0.9469 8,830,616 15 78 .007968739
D3 7,188,990 1.0509 6,840,794 20 1,641 .026162805
F1 1,353,760 0.8545 1,584,272 5 84 .079060033
F1 1,361,540 0.9185 1,482,352 6 26 .016992251
F1 1,335,720 0.8784 1,520,628 4 10 .033067712
F1 1,100,650 0.8735 1,260,046 2 3 .009717161
L1 1,407,840 0.7589 1,855,106 6 42 .121450153
L1 1,640,960 1.0044 1,633,771 4 8 .000618677
L1 1,105,170 0.9981 1,107,274 3 3 .000020086
Random Totals: 50,538,350   54,184,267 109 2,694  
Catg J Exception Values: 2,268,353   2,273,201      
Catg D1 Exception Values: 30,490,140   30,348,322      
Catg L1 Exception Values: 1,019,080   900,118      
Total Test Values (4): 84,315,923   87,705,908      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 4,385,295

Confidence Interval Values (5)

State Lower Limit: 83,320,613 (State Test Value minus Margin of Error Percent)
Local Test Value: 84,315,923 (Within Confidence Interval)
State Upper Limit: 92,091,203 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 82,820,715 (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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