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2006 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 7,872,857 1.0159 7,749,638 28 488 .135710835
A 7,837,102 0.9911 7,907,479 16 199 .014366729
A 7,857,087 0.9791 8,024,805 15 128 .020142081
A 7,843,778 0.9715 8,073,884 15 80 .003998257
D3 7,116,780 0.9273 7,674,733 20 2,060 .169441479
F1 1,309,358 1.2546 1,043,646 6 84 .142162183
F1 1,274,510 0.9779 1,303,313 6 27 .002526868
F1 1,310,019 0.9294 1,409,532 5 11 .004009902
F1 1,246,135 0.9190 1,355,968 3 4 .003422851
L1 1,197,049 0.9599 1,247,056 6 49 .001666927
L1 1,253,836 0.9846 1,273,447 4 7 .000101425
L1 1,143,862 0.9321 1,227,188 2 3 .009655236
Random Totals: 47,262,373   48,290,689 126 3,140  
Catg J Exception Values: 2,243,190   2,305,764      
Catg D1 Exception Values: 28,186,480   29,483,816      
Catg L1 Exception Values: 1,022,180   1,012,180      
Total Test Values (4): 78,714,223   81,092,449      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 4,054,622

Confidence Interval Values (5)

State Lower Limit: 77,037,827 (State Test Value minus Margin of Error Percent)
Local Test Value: 78,714,223 (Within Confidence Interval)
State Upper Limit: 85,147,071 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 73,636,480 (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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