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2008 Confidence Interval Detail
250/Wood
230-901/Big Sandy ISD

Category Summary

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

Stratum
Variance
A 6,532,960 0.8676 7,529,922 10 105 .009613408
D3 4,883,281 1.4611 3,342,195 10 229 .233330008
Random Totals: 11,416,241   10,872,117 20 334  
Catg D1 Exception Values: 965,111   743,752      
Total Test Values (4): 12,381,352   11,615,869      

Margin of Error

Margin of Error Percent: 9.8787013
Margin of Error Value: 1,147,497

Confidence Interval Values (5)

State Lower Limit: 10,468,372 (State Test Value minus Margin of Error Percent)
Local Test Value: 12,381,352 (Within Confidence Interval)
State Upper Limit: 12,763,366 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 28,533,187 (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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