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2010 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 11,930,112 0.7567 15,765,973 10 804 .124633679
A 11,926,687 0.9638 12,374,649 10 467 .017910019
A 12,260,168 1.0111 12,125,574 10 329 .050009084
A 11,901,416 1.1665 10,202,671 9 167 .027928521
D3 28,160,176 1.0489 26,847,341 20 2,180 .027484374
F1 3,375,436 0.9650 3,497,861 9 82 .015805989
F1 3,478,545 0.9450 3,681,000 7 29 .032003639
F1 3,378,359 0.9580 3,526,471 5 9 .008073951
G1 9,441,271 0.9984 9,456,401 8 46 .004562369
G1 10,586,480 1.0082 10,500,377 6 13 .151724786
G1 10,077,165 1.0643 9,468,350 3 5 .027654468
Random Totals: 116,515,815   117,446,668 97 4,131  
Catg J Exception Values: 9,079,207   9,935,716      
Catg D1 Exception Values: 27,652,077   37,563,201      
Catg F1 Exception Values: 3,164,461   3,073,534      
Catg G1 Exception Values: 7,493,344   7,535,017      
Total Test Values (4): 163,904,904   175,554,136      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 8,777,707

Confidence Interval Values (5)

Local Test Value: 163,904,904 (Outside Confidence Interval)
State Lower Limit: 166,776,429 (State Test Value minus Margin of Error Percent)
State Upper Limit: 184,331,843 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 196,003,064 (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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