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2010 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 9,670,539,188 0.9648 10,023,361,513 95 58,271 .007651741
A 8,971,284,531 0.9777 9,175,907,263 96 35,053 .005754554
A 8,863,416,804 0.9650 9,184,887,880 95 23,450 .005077596
A 7,913,035,632 0.9398 8,419,914,484 94 10,355 .008902647
B 1,806,198,828 0.9742 1,854,032,876 60 6,896 .017329757
B 2,003,134,276 0.9812 2,041,514,753 15 755 .013355520
B 1,904,767,534 0.9887 1,926,537,407 9 124 .000311490
B 1,823,556,604 0.9959 1,831,063,966 9 55 .000360440
C 194,003,761 0.9482 204,602,152 16 2,542 .030686218
C 156,156,324 0.9492 164,513,616 18 677 .016407373
C 160,938,367 0.9600 167,644,132 10 295 .018721680
C 212,417,586 0.9907 214,411,614 9 93 .004199817
F1 3,644,131,216 0.9228 3,948,993,515 42 4,213 .022226977
F1 3,438,928,782 0.9847 3,492,361,919 10 866 .008711684
F1 3,337,460,661 0.8930 3,737,357,963 11 237 .050606115
F1 2,960,326,765 0.9836 3,009,685,609 9 61 .000693692
L1 802,772,071 0.9643 832,492,037 10 6,380 .020256241
L1 742,354,352 0.9601 773,205,241 10 1,102 .021656628
L1 714,282,041 1.0109 706,580,316 10 294 .010307572
L1 800,030,360 1.0577 756,386,839 9 66 .029035806
Random Totals: 60,119,735,683   62,465,455,095 637 151,785  
Catg J Exception Values: 235,050,036   315,026,323      
Catg D1 Exception Values: 1,920,357   1,691,538      
Total Test Values (4): 60,356,706,076   62,782,172,956      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 3,139,108,648

Confidence Interval Values (5)

State Lower Limit: 59,643,064,308 (State Test Value minus Margin of Error Percent)
Local Test Value: 60,356,706,076 (Within Confidence Interval)
State Upper Limit: 65,921,281,604 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 59,878,940,779 (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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