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2007 Confidence Interval Detail
039/Clay
039-903/Petrolia ISD

Category Summary

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

Stratum
Variance
A 9,694,683 0.9178 10,562,958 9 246 .027204463
A 9,591,322 1.0213 9,391,288 10 129 .015856838
A 9,682,781 1.0107 9,580,272 7 83 .001618522
A 9,601,521 1.0360 9,267,877 14 52 .003514798
D3 20,567,110 1.0130 20,303,169 11 1,346 .000686263
Random Totals: 59,137,417   59,105,564 51 1,856  
Catg J Exception Values: 4,049,585   4,134,575      
Catg D1 Exception Values: 8,276,720   7,750,493      
Total Test Values (4): 71,463,722   70,990,632      

Margin of Error

Margin of Error Percent: 5.0000006
Margin of Error Value: 3,549,532

Confidence Interval Values (5)

State Lower Limit: 67,441,100 (State Test Value minus Margin of Error Percent)
Local Test Value: 71,463,722 (Within Confidence Interval)
State Upper Limit: 74,540,164 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 79,735,528 (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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