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2009 Confidence Interval Detail
227/Travis
011-902/Elgin ISD

Category Summary

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

Stratum
Variance
A 34,950,722 1.0447 33,455,271 8 330 .009642697
A 32,305,235 1.0137 31,868,635 8 255 .017139556
A 29,017,095 1.0304 28,161,001 8 194 .002660335
A 31,179,581 0.9922 31,424,694 8 137 .026545314
D3 28,172,885 1.0111 27,863,599 18 857 .004025597
Random Totals: 155,625,518   152,773,200 50 1,773  
Catg D1 Exception Values: 5,199,394   5,080,466      
Total Test Values (4): 160,824,912   157,853,666      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 7,892,683

Confidence Interval Values (5)

State Lower Limit: 149,960,983 (State Test Value minus Margin of Error Percent)
Local Test Value: 160,824,912 (Within Confidence Interval)
State Upper Limit: 165,746,349 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 178,908,605 (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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