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2007 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 7,703,423 0.7830 9,838,344 8 287 .139215351
A 7,742,850 0.9671 8,006,256 8 155 .047299158
A 7,642,908 1.1218 6,813,075 7 98 .013812045
A 7,685,288 1.0742 7,154,429 7 56 .025373756
D3 42,759,420 0.9224 46,356,700 20 3,721 .115446226
G1 13,263,910 0.9983 13,286,497 6 27 .005335451
G1 12,735,770 1.0443 12,195,509 4 10 .001140949
G1 14,325,160 1.0276 13,940,405 4 7 .005332872
Random Totals: 113,858,729   117,591,215 64 4,361  
Catg J Exception Values: 6,034,733   6,003,920      
Catg D1 Exception Values: 14,157,335   13,316,207      
Catg G1 Exception Values: 11,146,540   10,965,039      
Total Test Values (4): 145,197,337   147,876,381      

Margin of Error

Margin of Error Percent: 5.2099889
Margin of Error Value: 7,704,343

Confidence Interval Values (5)

State Lower Limit: 140,172,038 (State Test Value minus Margin of Error Percent)
Local Test Value: 145,197,337 (Within Confidence Interval)
State Upper Limit: 155,580,724 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 147,914,524 (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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