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2009 Confidence Interval Detail
008/Austin
008-901/Bellville ISD

Category Summary

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

Stratum
Variance
A 89,043,577 0.8818 100,979,334 12 1,002 .013173953
A 89,189,834 0.8947 99,686,860 11 602 .008033920
A 82,268,745 0.9466 86,909,724 12 389 .013947199
A 93,655,146 0.9023 103,796,017 12 272 .024157093
D3 411,129,414 0.8680 473,651,399 32 9,124 .069907454
F1 16,032,930 0.8659 18,515,914 9 128 .020889742
F1 15,961,379 0.9399 16,981,997 9 60 .005897241
F1 15,905,659 0.9122 17,436,592 6 33 .026963148
F1 15,917,773 0.8818 18,051,455 5 16 .026454032
G1 12,573,960 1.0049 12,512,648 6 27 .001142961
G1 12,557,040 1.0827 11,597,894 5 12 .030039541
G1 14,233,601 1.0024 14,199,522 3 5 .011014007
Random Totals: 868,469,058   974,319,356 122 11,670  
Catg D1 Exception Values: 21,645,038   21,577,821      
Catg G1 Exception Values: 8,312,740   8,012,180      
Total Test Values (4): 898,426,836   1,003,909,357      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 50,195,468

Confidence Interval Values (5)

Local Test Value: 898,426,836 (Outside Confidence Interval)
State Lower Limit: 953,713,889 (State Test Value minus Margin of Error Percent)
State Upper Limit: 1,054,104,825 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 917,559,689 (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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