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2007 Confidence Interval Detail
070/Ellis
070-901/Avalon ISD

Category Summary

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

Stratum
Variance
A 2,702,815 0.8513 3,174,927 8 66 .062544822
A 2,633,798 0.8941 2,945,753 10 38 .019657763
A 2,744,304 0.9456 2,902,183 7 28 .052631715
A 2,571,602 1.0347 2,485,360 12 14 .012395215
D3 11,511,662 0.9661 11,915,601 22 604 .016435696
Random Totals: 22,164,181   23,423,824 59 750  
Catg J Exception Values: 1,388,940   1,377,188      
Catg D1 Exception Values: 3,536,298   3,886,216      
Catg F1 Exception Values: 3,502,160   3,437,405      
Catg L1 Exception Values: 1,768,060   1,928,801      
Total Test Values (4): 32,359,639   34,053,434      

Margin of Error

Margin of Error Percent: 5.0000009
Margin of Error Value: 1,702,672

Confidence Interval Values (5)

State Lower Limit: 32,350,762 (State Test Value minus Margin of Error Percent)
Local Test Value: 32,359,639 (Within Confidence Interval)
State Upper Limit: 35,756,106 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 31,601,675 (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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