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2009 Confidence Interval Detail
125/Jim Wells
125-905/Premont ISD

Category Summary

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

Stratum
Variance
A 4,630,406 1.0108 4,580,932 11 227 .012670671
A 6,063,567 0.9849 6,156,531 10 178 .001484363
A 11,068,919 0.9679 11,436,015 10 221 .024890894
A 16,322,502 0.9538 17,113,129 9 183 .000932409
D3 15,495,827 1.0269 15,089,908 25 1,272 .024864998
G1 2,820,942 0.9559 2,951,085 8 11 .017071931
G1 3,049,139 0.9285 3,283,941 5 6 .031967449
G1 3,165,644 0.9807 3,227,943 3 4 .037311210
Random Totals: 62,616,946   63,839,484 81 2,102  
Catg J Exception Values: 7,404,680   7,579,094      
Catg D1 Exception Values: 8,956,036   8,708,828      
Catg G1 Exception Values: 10,879,765   10,563,311      
Total Test Values (4): 89,857,427   90,690,717      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 4,534,536

Confidence Interval Values (5)

State Lower Limit: 86,156,181 (State Test Value minus Margin of Error Percent)
Local Test Value: 89,857,427 (Within Confidence Interval)
State Upper Limit: 95,225,253 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 113,341,743 (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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