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2007 Confidence Interval Detail
227/Travis
227-913/Lake Travis ISD

Category Summary

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

Stratum
Variance
A 1,162,250,165 0.9532 1,219,314,063 25 4,672 .010435192
A 1,161,872,541 0.9478 1,225,862,567 24 2,891 .008265560
A 1,162,454,692 0.9577 1,213,798,363 24 1,799 .003057320
A 1,161,384,196 0.9661 1,202,136,628 26 824 .001516218
C 93,503,326 0.8275 112,994,956 55 2,737 .083075496
C 93,369,770 0.8974 104,044,763 34 654 .038701437
C 93,941,486 0.9934 94,565,619 14 248 .025269877
C 92,913,525 1.0245 90,691,581 6 50 .021245509
F1 135,210,978 0.9689 139,551,015 8 235 .005150127
F1 136,223,286 0.9200 148,068,789 8 59 .005454392
F1 142,977,901 1.0166 140,643,223 5 17 .009472065
F1 120,875,890 1.0517 114,933,812 2 3 .000142732
Random Totals: 5,556,977,756   5,806,605,379 231 14,189  
Catg D1 Exception Values: 1,735,870   1,469,236      
Total Test Values (4): 5,558,713,626   5,808,074,615      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 290,403,731

Confidence Interval Values (5)

State Lower Limit: 5,517,670,884 (State Test Value minus Margin of Error Percent)
Local Test Value: 5,558,713,626 (Within Confidence Interval)
State Upper Limit: 6,098,478,346 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 5,703,273,314 (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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