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2007 Confidence Interval Detail
228/Trinity
228-905/Apple Springs ISD

Category Summary

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

Stratum
Variance
A 1,613,043 0.8292 1,945,300 8 92 .038065343
A 1,582,540 0.8858 1,786,566 10 55 .037922388
A 1,643,499 0.9135 1,799,123 9 38 .010042006
A 1,540,425 0.7988 1,928,424 7 20 .017923220
D3 10,008,896 0.8217 12,180,718 21 1,384 .058535628
Random Totals: 16,388,403   19,640,131 55 1,589  
Catg J Exception Values: 1,301,610   1,273,565      
Catg D1 Exception Values: 7,496,993   7,426,573      
Total Test Values (4): 25,187,006   28,340,269      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 1,417,013

Confidence Interval Values (5)

Local Test Value: 25,187,006 (Outside Confidence Interval)
State Lower Limit: 26,923,256 (State Test Value minus Margin of Error Percent)
State Upper Limit: 29,757,282 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 21,937,167 (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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