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2008 Confidence Interval Detail
226/Tom Green
226-906/Wall ISD

Category Summary

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

Stratum
Variance
A 13,432,450 0.9351 14,364,720 20 227 .034865510
A 19,800,400 1.0853 18,244,172 20 188 .022376552
A 36,023,900 1.0166 35,435,668 24 236 .013740540
A 59,711,400 1.0865 54,957,570 30 210 .052792249
D3 39,305,730 0.8314 47,276,558 31 2,460 .174905562
G1 2,818,390 0.9931 2,837,972 3 8 .000059371
G1 3,485,560 0.9996 3,486,955 2 3 .000000018
Random Totals: 174,577,830   176,603,615 130 3,332  
Catg D1 Exception Values: 32,946,930   31,098,539      
Catg G1 Exception Values: 13,222,050   13,215,638      
Total Test Values (4): 220,746,810   220,917,792      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 11,045,890

Confidence Interval Values (5)

State Lower Limit: 209,871,902 (State Test Value minus Margin of Error Percent)
Local Test Value: 220,746,810 (Within Confidence Interval)
State Upper Limit: 231,963,682 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 209,365,065 (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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