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2008 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 1,105,425,666 0.9696 1,140,084,226 69 4,740 .013879271
A 1,373,606,000 0.9495 1,446,662,454 70 3,680 .011805177
A 1,509,580,528 0.9533 1,583,531,447 70 2,572 .007606710
A 1,503,246,902 0.9414 1,596,820,588 70 1,156 .022050893
C 110,567,129 0.9001 122,838,717 56 2,850 .138307376
C 82,404,641 0.8224 100,200,196 29 667 .061572102
C 85,537,758 0.9140 93,586,168 28 339 .016666121
C 73,983,052 0.9785 75,608,638 7 88 .001873196
F1 139,743,078 0.7121 196,240,806 7 260 .081783553
F1 165,014,442 0.9589 172,087,227 6 79 .001327146
F1 194,369,367 0.9820 197,932,146 5 31 .002985621
F1 204,055,569 0.9551 213,648,381 4 6 .003955078
Random Totals: 6,547,534,132   6,939,240,994 421 16,468  
Catg D1 Exception Values: 1,741,761   1,230,472      
Total Test Values (4): 6,549,275,893   6,940,471,466      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 347,023,573

Confidence Interval Values (5)

Local Test Value: 6,549,275,893 (Outside Confidence Interval)
State Lower Limit: 6,593,447,893 (State Test Value minus Margin of Error Percent)
State Upper Limit: 7,287,495,039 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 6,668,117,344 (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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