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2006 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 1,012,233,373 0.9815 1,031,312,657 66 4,319 .003064839
A 1,012,206,627 0.9885 1,023,982,425 66 2,684 .007367036
A 1,012,687,249 0.9780 1,035,467,535 65 1,767 .003653237
A 1,011,421,189 0.9702 1,042,487,311 62 847 .004767519
C 76,951,138 0.9828 78,297,861 60 3,152 .000753047
C 77,515,548 1.0024 77,329,956 51 1,012 .012781899
C 75,971,338 0.9929 76,514,592 53 482 .001803684
C 76,332,251 1.0379 73,544,899 42 158 .057730189
F1 107,022,601 0.8759 122,185,867 8 211 .026253046
F1 107,196,848 0.8947 119,813,175 7 57 .003383248
F1 106,811,585 0.9639 110,811,894 5 20 .010224434
F1 103,523,867 1.0588 97,774,714 6 8 .020172747
Random Totals: 4,779,873,614   4,889,522,886 491 14,717  
Catg D1 Exception Values: 1,787,840   2,015,662      
Total Test Values (4): 4,781,661,454   4,891,538,548      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 244,576,927

Confidence Interval Values (5)

State Lower Limit: 4,646,961,621 (State Test Value minus Margin of Error Percent)
Local Test Value: 4,781,661,454 (Within Confidence Interval)
State Upper Limit: 5,136,115,475 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 4,803,609,107 (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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