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2009 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 11,385,653 0.9600 11,860,055 7 786 .004255609
A 11,519,776 0.9454 12,185,081 9 465 .007157273
A 13,032,530 0.9374 13,902,848 7 358 .006156917
A 11,999,862 0.8998 13,336,144 7 172 .021721443
D3 26,842,622 1.0212 26,285,372 25 2,178 .086260020
F1 3,487,620 0.9352 3,729,277 7 82 .012922642
F1 3,323,424 0.9163 3,627,004 6 27 .008771693
F1 3,378,359 0.9298 3,633,425 4 9 .001255111
G1 9,150,746 1.0096 9,063,734 17 41 .024496604
G1 9,989,562 1.0421 9,585,992 13 14 .011920678
Random Totals: 104,110,154   107,208,932 102 4,132  
Catg J Exception Values: 8,609,939   8,950,147      
Catg D1 Exception Values: 27,726,687   33,644,527      
Catg F1 Exception Values: 3,164,461   3,191,339      
Catg G1 Exception Values: 16,746,090   15,914,678      
Total Test Values (4): 160,357,331   168,909,623      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 8,445,481

Confidence Interval Values (5)

Local Test Value: 160,357,331 (Outside Confidence Interval)
State Lower Limit: 160,464,142 (State Test Value minus Margin of Error Percent)
State Upper Limit: 177,355,104 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 186,006,870 (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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