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2006 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 11,217,555 0.9703 11,560,914 7 807 .011561077
A 11,219,688 0.8635 12,993,269 7 472 .011503744
A 11,199,769 1.0228 10,950,107 7 327 .021127708
A 11,210,371 1.0277 10,908,213 8 179 .007045077
D3 22,932,536 1.0842 21,151,574 26 2,169 .012197377
F1 2,861,696 0.9490 3,015,486 6 77 .004634948
F1 2,860,269 0.9293 3,077,875 6 27 .008324283
F1 3,031,368 0.9300 3,259,535 4 11 .008014596
G1 12,188,083 1.0799 11,286,307 6 33 .018661332
G1 12,595,596 1.0189 12,361,955 4 9 .000597484
G1 15,246,056 1.1726 13,001,924 3 4 .097364870
Random Totals: 116,562,987   113,567,159 84 4,115  
Catg J Exception Values: 10,164,099   10,310,450      
Catg D1 Exception Values: 26,871,069   28,089,504      
Catg F1 Exception Values: 2,479,390   2,666,441      
Catg G1 Exception Values: 7,200,988   7,445,087      
Total Test Values (4): 163,278,533   162,078,641      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 8,103,932

Confidence Interval Values (5)

State Lower Limit: 153,974,709 (State Test Value minus Margin of Error Percent)
Local Test Value: 163,278,533 (Within Confidence Interval)
State Upper Limit: 170,182,573 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 188,796,015 (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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