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2008 Confidence Interval Detail
254/Zavala
254-901/Crystal City ISD

Category Summary

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

Stratum
Variance
A 11,192,551 0.8581 13,043,411 8 788 .027480244
A 11,159,855 0.7679 14,532,954 7 462 .009027199
A 11,380,382 0.8994 12,653,304 8 327 .025821493
A 12,738,243 0.9051 14,073,852 7 200 .016160115
D3 27,307,483 1.0911 25,027,480 10 2,169 .151988559
F1 3,477,266 0.8381 4,148,987 6 83 .123203061
F1 3,324,380 0.7877 4,220,363 6 26 .031568187
F1 3,378,377 0.9586 3,524,282 4 9 .002400510
G1 20,677,916 1.0630 19,452,414 6 39 .051823189
G1 22,104,711 1.2644 17,482,372 4 9 .076507085
G1 26,033,220 1.2991 20,039,427 3 4 .491198725
Random Totals: 152,774,384   148,198,846 69 4,116  
Catg J Exception Values: 8,873,339   8,706,637      
Catg D1 Exception Values: 28,019,932   30,682,715      
Catg F1 Exception Values: 3,100,723   3,162,592      
Catg G1 Exception Values: 11,926,564   11,452,501      
Total Test Values (4): 204,694,942   202,203,291      

Margin of Error

Margin of Error Percent: 5.7777151
Margin of Error Value: 11,682,730

Confidence Interval Values (5)

State Lower Limit: 190,520,561 (State Test Value minus Margin of Error Percent)
Local Test Value: 204,694,942 (Within Confidence Interval)
State Upper Limit: 213,886,021 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 221,746,964 (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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