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2009 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 1,591,260 1.0482 1,518,088 8 33 .075610871
A 1,407,410 0.9553 1,473,265 7 17 .017305337
A 1,740,940 0.9535 1,825,842 6 16 .021861475
A 1,541,820 0.9870 1,562,128 4 7 .010050912
D3 4,644,113 1.1904 3,901,305 20 235 .240146774
Random Totals: 10,925,543   10,280,628 45 308  
Catg D1 Exception Values: 861,463   817,216      
Catg G1 Exception Values: 14,554,501   14,830,001      
Total Test Values (4): 26,341,507   25,927,845      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 1,296,392

Confidence Interval Values (5)

State Lower Limit: 24,631,453 (State Test Value minus Margin of Error Percent)
Local Test Value: 26,341,507 (Within Confidence Interval)
State Upper Limit: 27,224,237 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 25,633,847 (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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