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2007 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 11,293,196 0.9839 11,477,992 11 807 .008458922
A 11,285,831 0.9172 12,304,657 11 471 .008692125
A 11,294,875 0.8925 12,655,322 12 324 .025360201
A 11,239,112 1.0050 11,183,196 9 171 .004840701
D3 24,099,392 1.2283 19,620,119 18 2,178 .035870955
F1 3,306,918 0.9567 3,456,588 6 75 .003610463
F1 3,227,443 0.9403 3,432,355 5 25 .008822765
F1 3,716,984 1.0058 3,695,550 5 10 .001743789
G1 12,411,220 1.0068 12,327,394 9 24 .027228857
G1 11,168,454 1.0337 10,804,347 5 9 .005498736
G1 15,144,978 0.9976 15,181,413 3 5 .000098799
Random Totals: 118,188,403   116,138,933 94 4,099  
Catg J Exception Values: 8,856,961   8,895,437      
Catg D1 Exception Values: 27,675,153   29,022,759      
Catg F1 Exception Values: 2,529,651   2,496,422      
Catg G1 Exception Values: 29,333,597   28,189,357      
Total Test Values (4): 186,583,765   184,742,908      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 9,237,145

Confidence Interval Values (5)

State Lower Limit: 175,505,763 (State Test Value minus Margin of Error Percent)
Local Test Value: 186,583,765 (Within Confidence Interval)
State Upper Limit: 193,980,053 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 240,725,821 (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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