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2011 Confidence Interval Detail
210/Shelby
210-905/Timpson ISD

Category Summary

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

Stratum
Variance
A 7,436,480 0.9587 7,756,837 7 280 .051368092
A 8,590,940 0.9031 9,512,723 7 171 .063575105
A 8,749,560 0.9321 9,386,933 7 110 .060522765
A 8,432,990 1.0271 8,210,486 7 57 .029535417
D3 49,346,642 1.0851 45,476,585 16 3,109 .031846182
G1 5,926,880 0.9720 6,097,613 8 38 .101159622
G1 5,731,770 1.0320 5,554,041 6 13 .005024226
G1 6,259,910 1.0028 6,242,431 6 9 .008347878
G1 5,104,890 0.9753 5,234,174 2 3 .034004550
Random Totals: 105,580,062   103,471,823 66 3,790  
Catg J Exception Values: 9,695,039   7,822,882      
Catg D1 Exception Values: 16,117,988   14,057,717      
Total Test Values (4): 131,393,089   125,352,422      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 6,267,621

Confidence Interval Values (5)

State Lower Limit: 119,084,801 (State Test Value minus Margin of Error Percent)
Local Test Value: 131,393,089 (Within Confidence Interval)
State Upper Limit: 131,620,043 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 149,020,209 (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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