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2009 Confidence Interval Detail
091/Grayson
091-907/Tioga ISD

Category Summary

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

Stratum
Variance
A 9,093,416 0.9739 9,337,115 7 142 .004277645
A 9,138,059 0.9527 9,591,749 7 92 .006296634
A 9,327,314 0.9755 9,561,573 6 69 .001368179
A 9,274,819 1.0647 8,711,204 6 38 .007499071
D3 26,211,079 0.8984 29,175,288 19 725 .132865866
F1 3,589,642 0.8526 4,210,230 11 32 .071926014
Random Totals: 66,634,329   70,587,159 56 1,098  
Catg D1 Exception Values: 2,248,309   1,837,347      
Catg F1 Exception Values: 912,644   901,762      
Total Test Values (4): 69,795,282   73,326,268      

Margin of Error

Margin of Error Percent: 6.7526906
Margin of Error Value: 4,951,496

Confidence Interval Values (5)

State Lower Limit: 68,374,772 (State Test Value minus Margin of Error Percent)
Local Test Value: 69,795,282 (Within Confidence Interval)
State Upper Limit: 78,277,764 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 71,423,920 (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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