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2009 Confidence Interval Detail
015/Bexar
015-909/Somerset ISD

Category Summary

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

Stratum
Variance
A 41,263,980 0.9941 41,508,882 12 807 .033743401
A 37,854,001 0.9668 39,153,911 12 423 .059647531
A 39,239,436 1.0056 39,020,919 12 284 .025331114
A 31,874,581 1.0013 31,833,198 11 133 .007742076
C 3,620,450 1.2299 2,943,695 7 402 .027853197
C 3,522,140 0.8108 4,344,031 7 164 .026501100
C 3,247,730 1.1540 2,814,324 7 106 .015869644
C 3,239,343 1.0472 3,093,337 7 47 .018439248
D3 50,816,329 1.0345 49,121,633 20 1,441 .031205056
F1 5,512,463 0.9806 5,621,520 6 60 .017475501
F1 5,803,928 0.9626 6,029,429 6 28 .033712186
F1 5,118,310 0.9379 5,457,202 5 13 .037438234
F1 6,938,970 1.0254 6,767,086 3 6 .036234355
Random Totals: 238,051,661   237,709,167 115 3,914  
Catg D1 Exception Values: 1,944,423   2,137,835      
Total Test Values (4): 239,996,084   239,847,002      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 11,992,350

Confidence Interval Values (5)

State Lower Limit: 227,854,652 (State Test Value minus Margin of Error Percent)
Local Test Value: 239,996,084 (Within Confidence Interval)
State Upper Limit: 251,839,352 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 236,080,528 (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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