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2009 Confidence Interval Detail
187/Polk
229-906/Chester ISD

Category Summary

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

Stratum
Variance
A 2,418,020 0.9160 2,639,760 16 95 .024288627
A 2,689,748 0.8534 3,151,802 14 49 .019990776
A 2,340,659 0.9030 2,592,092 11 23 .005238060
A 3,344,145 1.0261 3,259,083 10 21 .000575097
D3 7,910,820 0.9519 8,310,558 21 739 .012727876
Random Totals: 18,703,392   19,953,295 72 927  
Catg D1 Exception Values: 7,166,912   8,155,287      
Total Test Values (4): 25,870,304   28,108,582      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 1,405,429

Confidence Interval Values (5)

Local Test Value: 25,870,304 (Outside Confidence Interval)
State Lower Limit: 26,703,153 (State Test Value minus Margin of Error Percent)
State Upper Limit: 29,514,011 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 26,618,350 (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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