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2006 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 6,052,545 0.9618 6,292,935 7 219 .001311235
A 6,119,062 0.9554 6,404,712 8 115 .000406253
A 6,030,814 0.9676 6,232,755 7 74 .000070995
A 5,964,902 0.9921 6,012,400 7 43 .000012265
D3 8,445,595 0.9468 8,920,147 10 1,407 .002323201
G1 14,971,474 0.9062 16,521,159 7 43 .009971716
G1 17,912,636 1.0835 16,532,198 4 7 .002399992
G1 24,187,200 1.0485 23,068,383 2 4 .000942951
Random Totals: 89,684,228   89,984,689 52 1,912  
Catg J Exception Values: 6,607,800   6,675,327      
Catg D1 Exception Values: 12,838,330   11,807,196      
Total Test Values (4): 109,130,358   108,467,212      

Margin of Error

Margin of Error Percent: 5.0000004
Margin of Error Value: 5,423,361

Confidence Interval Values (5)

State Lower Limit: 103,043,851 (State Test Value minus Margin of Error Percent)
Local Test Value: 109,130,358 (Within Confidence Interval)
State Upper Limit: 113,890,573 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 108,163,349 (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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