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2006 Confidence Interval Detail
226/Tom Green
226-906/Wall ISD

Category Summary

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

Stratum
Variance
A 20,571,798 0.9503 21,647,688 8 342 .000178519
A 20,644,143 0.9637 21,421,753 7 205 .000226005
A 20,533,700 0.9818 20,914,341 9 142 .000154882
A 20,536,875 0.9882 20,782,104 8 74 .001111757
D3 25,575,630 0.9670 26,448,428 20 2,421 .000941467
Random Totals: 107,862,146   111,214,314 52 3,184  
Catg D1 Exception Values: 30,325,720   30,817,315      
Total Test Values (4): 138,187,866   142,031,629      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 7,101,581

Confidence Interval Values (5)

State Lower Limit: 134,930,048 (State Test Value minus Margin of Error Percent)
Local Test Value: 138,187,866 (Within Confidence Interval)
State Upper Limit: 149,133,210 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 163,222,155 (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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