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2007 Confidence Interval Detail
227/Travis
227-910/Del Valle ISD

Category Summary

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

Stratum
Variance
A 217,399,625 0.9492 229,034,582 17 2,487 .019704824
A 217,386,854 0.9394 231,410,319 21 1,783 .005919548
A 217,393,966 0.9609 226,239,948 36 1,445 .003879737
A 217,243,041 1.0121 214,645,826 20 976 .012808882
B 85,304,961 0.7908 107,871,726 7 95 .127741685
B 86,267,676 1.0042 85,906,867 4 7 .003540213
B 81,215,361 0.9290 87,422,348 3 4 .005250364
D3 177,663,545 0.9634 184,413,063 13 3,678 .033859993
F1 136,130,313 0.9506 143,204,621 8 205 .009010453
F1 138,299,861 0.8858 156,129,895 8 46 .049290927
F1 145,648,939 1.0134 143,723,050 7 19 .008258308
F1 121,466,347 1.0956 110,867,422 3 5 .006427169
L1 114,790,015 0.9765 117,552,499 7 248 .007326058
L1 113,935,401 0.9738 117,000,823 9 36 .004132598
L1 117,383,938 1.0088 116,359,970 4 11 .000379316
L1 108,871,506 0.9976 109,133,426 3 5 .000035392
Random Totals: 2,296,401,349   2,380,916,385 170 11,050  
Catg D1 Exception Values: 9,064,081   7,600,557      
Catg B Exception Values: 84,069,800   84,072,238      
Total Test Values (4): 2,389,535,230   2,472,589,180      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 123,629,459

Confidence Interval Values (5)

State Lower Limit: 2,348,959,721 (State Test Value minus Margin of Error Percent)
Local Test Value: 2,389,535,230 (Within Confidence Interval)
State Upper Limit: 2,596,218,639 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,000,015,753 (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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