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2011 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 1,573,870 0.8834 1,781,605 11 32 .014695318
A 1,487,360 0.8293 1,793,513 10 18 .043283045
A 1,764,730 0.9507 1,856,243 6 16 .006715430
A 1,134,530 0.8583 1,321,834 4 5 .052024110
D3 4,489,203 0.8951 5,015,309 15 240 .194244603
Random Totals: 10,449,693   11,768,504 46 311  
Catg D1 Exception Values: 883,351   808,307      
Catg G1 Exception Values: 15,841,182   15,656,388      
Total Test Values (4): 27,174,226   28,233,199      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 1,411,660

Confidence Interval Values (5)

State Lower Limit: 26,821,539 (State Test Value minus Margin of Error Percent)
Local Test Value: 27,174,226 (Within Confidence Interval)
State Upper Limit: 29,644,859 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 27,120,632 (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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