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2008 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 7,893,780 1.0795 7,312,441 23 476 .103838656
A 8,115,200 0.9865 8,226,254 17 203 .069186667
A 8,056,300 0.9543 8,442,104 15 131 .011233298
A 10,352,420 0.9911 10,445,384 15 104 .012264898
D3 7,031,430 0.8648 8,130,701 21 1,642 .503381548
F1 1,306,730 1.2332 1,059,625 5 83 .250511755
F1 1,392,160 0.9057 1,537,109 5 27 .000966165
F1 1,078,320 0.8273 1,303,421 4 9 .027243853
L1 1,090,340 1.0318 1,056,736 6 52 .003431398
L1 1,411,680 0.9908 1,424,788 4 8 .000719047
L1 1,221,710 0.9965 1,226,001 3 4 .000034812
Random Totals: 48,950,070   50,164,564 118 2,739  
Catg J Exception Values: 2,104,725   1,835,852      
Catg D1 Exception Values: 24,134,740   28,377,195      
Catg F1 Exception Values: 911,660   1,038,908      
Catg L1 Exception Values: 446,730   446,730      
Total Test Values (4): 76,547,925   81,863,249      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 4,093,162

Confidence Interval Values (5)

Local Test Value: 76,547,925 (Outside Confidence Interval)
State Lower Limit: 77,770,087 (State Test Value minus Margin of Error Percent)
State Upper Limit: 85,956,411 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 74,587,299 (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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