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2011 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 8,479,540 0.9399 9,021,747 13 461 .253618790
A 8,516,040 0.9445 9,016,453 11 200 .062219376
A 8,526,100 0.9681 8,807,045 11 129 .015683468
A 8,721,650 0.8884 9,817,256 12 81 .015590197
D3 7,638,990 0.9767 7,821,225 21 1,669 .003478261
F1 1,289,920 0.9287 1,388,952 9 83 .030033693
F1 1,329,740 0.9572 1,389,198 9 27 .060237950
F1 1,316,690 0.8005 1,644,834 5 11 .152521233
F1 1,714,740 0.7000 2,449,629 2 4 .038669539
L1 2,848,870 1.0859 2,623,510 10 42 .132343588
L1 3,428,640 1.1453 2,993,661 4 7 .026228918
Random Totals: 53,810,920   56,973,510 107 2,714  
Catg J Exception Values: 16,810   17,063      
Catg D1 Exception Values: 23,380,120   26,278,835      
Total Test Values (4): 77,207,850   83,269,408      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 4,163,470

Confidence Interval Values (5)

Local Test Value: 77,207,850 (Outside Confidence Interval)
State Lower Limit: 79,105,938 (State Test Value minus Margin of Error Percent)
State Upper Limit: 87,432,878 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 79,471,065 (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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