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2007 Confidence Interval Detail
091/Grayson
091-905/Howe ISD

Category Summary

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

Stratum
Variance
A 27,787,183 0.9231 30,102,029 8 424 .032470062
A 27,725,989 0.9765 28,393,230 15 281 .012256289
A 27,747,652 1.0020 27,692,267 19 198 .004435244
A 27,730,006 0.9603 28,876,399 12 135 .013608768
D3 41,569,129 0.8331 49,896,926 25 1,310 .316942955
Random Totals: 152,559,959   164,960,851 79 2,348  
Catg D1 Exception Values: 6,669,721   5,037,935      
Total Test Values (4): 159,229,680   169,998,786      

Margin of Error

Margin of Error Percent: 7.0444080
Margin of Error Value: 11,975,408

Confidence Interval Values (5)

State Lower Limit: 158,023,378 (State Test Value minus Margin of Error Percent)
Local Test Value: 159,229,680 (Within Confidence Interval)
State Upper Limit: 181,974,194 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 176,807,734 (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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