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2009 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 1,674,610 0.7190 2,329,082 16 94 .066032248
A 1,716,458 0.6917 2,481,506 15 58 .029170594
A 1,709,553 0.6845 2,497,521 15 38 .025388063
A 1,728,942 0.7460 2,317,617 13 21 .038137650
D3 12,394,251 0.7225 17,154,673 19 1,394 .068177157
Random Totals: 19,223,814   26,780,399 78 1,605  
Catg J Exception Values: 1,392,650   780,761      
Catg D1 Exception Values: 11,949,514   11,677,678      
Total Test Values (4): 32,565,978   39,238,838      

Margin of Error

Margin of Error Percent: 5.2739355
Margin of Error Value: 2,069,431

Confidence Interval Values (5)

Local Test Value: 32,565,978 (Outside Confidence Interval)
State Lower Limit: 37,169,407 (State Test Value minus Margin of Error Percent)
State Upper Limit: 41,308,269 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 33,925,135 (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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