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2007 Confidence Interval Detail
226/Tom Green
226-905/Water Valley ISD

Category Summary

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

Stratum
Variance
A 6,252,869 0.8515 7,343,358 8 220 .044666917
A 6,280,651 0.8662 7,250,809 9 114 .041607461
A 6,230,302 0.9678 6,437,592 8 75 .000898076
A 6,228,029 1.1429 5,449,321 8 44 .034812666
D3 9,054,940 0.8664 10,451,223 11 1,575 .073934988
G1 12,328,660 0.9637 12,793,048 6 36 .004497056
G1 10,873,838 1.0632 10,227,462 4 7 .034967336
G1 13,569,315 0.9722 13,957,329 3 5 .009633810
Random Totals: 70,818,604   73,910,142 57 2,076  
Catg J Exception Values: 5,804,695   5,981,774      
Catg D1 Exception Values: 12,890,940   11,930,824      
Total Test Values (4): 89,514,239   91,822,740      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 4,591,137

Confidence Interval Values (5)

State Lower Limit: 87,231,603 (State Test Value minus Margin of Error Percent)
Local Test Value: 89,514,239 (Within Confidence Interval)
State Upper Limit: 96,413,877 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 109,733,207 (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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