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2008 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 8,589,274 1.0788 7,961,878 6 138 .018504263
A 8,417,851 0.9273 9,077,808 9 88 .008746249
A 9,330,600 0.9622 9,697,152 9 73 .004201838
A 10,394,873 1.0381 10,013,364 8 45 .001059040
D3 24,473,963 0.9437 25,934,050 11 733 .006316427
F1 4,295,992 0.7019 6,120,519 11 33 .303033161
Random Totals: 65,502,553   68,804,771 54 1,110  
Catg D1 Exception Values: 2,369,812   1,877,680      
Total Test Values (4): 67,872,365   70,682,451      

Margin of Error

Margin of Error Percent: 5.0000006
Margin of Error Value: 3,534,123

Confidence Interval Values (5)

State Lower Limit: 67,148,328 (State Test Value minus Margin of Error Percent)
Local Test Value: 67,872,365 (Within Confidence Interval)
State Upper Limit: 74,216,574 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 69,615,381 (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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