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2010 Confidence Interval Detail
091/Grayson
091-918/Tom Bean ISD

Category Summary

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

Stratum
Variance
A 26,077,455 0.9277 28,109,793 16 419 .017286231
A 25,018,483 0.9025 27,721,311 17 241 .016213069
A 21,325,108 0.9267 23,011,879 17 155 .014243767
A 24,688,952 0.9739 25,350,603 16 123 .008506614
D3 49,150,829 0.9817 50,067,056 20 1,508 .093921751
Random Totals: 146,260,827   154,260,642 86 2,446  
Catg J Exception Values: 2,657,410   2,450,726      
Catg D1 Exception Values: 3,455,428   2,630,748      
Total Test Values (4): 152,373,665   159,342,116      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 7,967,106

Confidence Interval Values (5)

State Lower Limit: 151,375,010 (State Test Value minus Margin of Error Percent)
Local Test Value: 152,373,665 (Within Confidence Interval)
State Upper Limit: 167,309,222 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 157,193,816 (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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