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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 0.6602 2,536,519 16 94 .065307216
A 1,716,458 0.6653 2,579,976 15 58 .026241550
A 1,709,553 0.6539 2,614,395 15 38 .023994191
A 1,728,942 0.7386 2,340,837 13 21 .042842251
D3 12,394,251 0.6595 18,793,406 20 1,394 .100762058
Random Totals: 19,223,814   28,865,133 79 1,605  
Catg J Exception Values: 1,392,650   788,376      
Catg D1 Exception Values: 11,949,514   11,677,678      
Total Test Values (4): 32,565,978   41,331,187      

Margin of Error

Margin of Error Percent: 6.4558852
Margin of Error Value: 2,668,294

Confidence Interval Values (5)

Local Test Value: 32,565,978 (Outside Confidence Interval)
State Lower Limit: 38,662,893 (State Test Value minus Margin of Error Percent)
State Upper Limit: 43,999,481 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 35,718,038 (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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