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2006 Confidence Interval Detail
227/Travis
227-901/Austin ISD

Category Summary

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

Stratum
Variance
A 6,707,012,963 0.9788 6,852,281,327 101 49,819 .003775001
A 6,710,312,219 0.9897 6,780,147,741 99 33,181 .005061055
A 6,704,814,811 0.9852 6,805,536,755 104 22,056 .002905567
A 6,705,517,420 0.9784 6,853,554,191 91 10,887 .009327465
B 1,469,359,463 0.8611 1,706,374,943 46 7,913 .053998705
B 1,469,663,080 0.7868 1,867,899,187 17 1,524 .089483231
B 1,476,136,567 1.0180 1,450,035,920 15 154 .004895606
B 1,461,591,318 0.9969 1,466,136,341 16 54 .005194633
C 154,397,324 0.9848 156,780,386 49 4,627 .000791548
C 154,704,935 0.9962 155,295,056 40 1,290 .004963252
C 154,104,953 0.9776 157,635,999 12 448 .000718723
C 154,133,275 0.9911 155,517,380 8 111 .003198567
F1 2,811,225,095 0.9938 2,828,763,428 25 3,875 .036032970
F1 2,816,461,055 0.9870 2,853,557,300 19 882 .008653810
F1 2,806,935,447 0.9647 2,909,645,949 15 277 .053885775
F1 2,809,686,187 0.9473 2,965,994,075 15 79 .013114310
L1 695,715,255 0.9659 720,276,690 7 6,170 .003131711
L1 696,140,667 0.9378 742,312,505 7 1,196 .001659192
L1 698,561,387 0.9747 716,693,739 7 381 .006581671
L1 692,437,685 0.9814 705,561,122 7 110 .001191084
Random Totals: 47,348,911,106   48,850,000,034 700 145,034  
Catg D1 Exception Values: 1,962,720   2,109,641      
Total Test Values (4): 47,350,873,826   48,852,109,675      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 2,442,605,484

Confidence Interval Values (5)

State Lower Limit: 46,409,504,191 (State Test Value minus Margin of Error Percent)
Local Test Value: 47,350,873,826 (Within Confidence Interval)
State Upper Limit: 51,294,715,159 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 46,988,491,454 (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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