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2009 Confidence Interval Detail
226/Tom Green
200-902/Miles ISD

Category Summary

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

Stratum
Variance
A 2,263,990 0.9313 2,431,000 7 42 .020894502
A 2,219,975 0.9687 2,291,705 5 25 .011543879
A 2,436,850 1.0047 2,425,450 6 20 .001573331
A 1,795,850 0.9141 1,964,610 4 9 .002053912
D3 10,795,463 1.0107 10,681,174 28 568 .019386300
Random Totals: 19,512,128   19,793,939 50 664  
Catg J Exception Values: 691,969   612,210      
Catg D1 Exception Values: 5,659,310   6,325,749      
Total Test Values (4): 25,863,407   26,731,898      

Margin of Error

Margin of Error Percent: 5.0000004
Margin of Error Value: 1,336,595

Confidence Interval Values (5)

State Lower Limit: 25,395,303 (State Test Value minus Margin of Error Percent)
Local Test Value: 25,863,407 (Within Confidence Interval)
State Upper Limit: 28,068,493 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 23,921,100 (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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