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2010 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 1,584,177,784 0.9641 1,643,167,497 96 6,133 .007312121
A 1,393,640,490 0.9630 1,447,186,386 95 3,360 .008403116
A 1,215,836,161 0.9848 1,234,602,113 57 1,879 .005432982
A 1,200,679,030 0.9582 1,253,056,804 36 857 .004329928
C 85,012,467 1.0059 84,513,835 24 2,111 .010752868
C 137,820,667 0.9815 140,418,408 21 1,226 .005239663
C 81,030,621 0.9963 81,331,548 12 353 .009987346
C 127,295,537 0.9840 129,365,383 9 163 .004638961
F1 184,211,740 0.9535 193,195,322 9 263 .021983562
F1 168,743,511 0.9699 173,980,319 9 69 .002254390
F1 182,602,443 0.9922 184,037,939 7 28 .001102586
F1 117,464,314 0.9830 119,495,742 3 4 .000385960
Random Totals: 6,478,514,765   6,684,351,296 378 16,446  
Catg J Exception Values: 15,370,063   18,992,757      
Catg D1 Exception Values: 1,627,626   972,853      
Total Test Values (4): 6,495,512,454   6,704,316,906      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 335,215,845

Confidence Interval Values (5)

State Lower Limit: 6,369,101,061 (State Test Value minus Margin of Error Percent)
Local Test Value: 6,495,512,454 (Within Confidence Interval)
State Upper Limit: 7,039,532,751 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 6,787,465,234 (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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