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2008 Confidence Interval Detail
020/Brazoria
020-906/Sweeny ISD

Category Summary

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

Stratum
Variance
A 68,678,203 1.0166 67,556,761 30 1,212 .080385479
A 69,713,960 1.0035 69,470,812 16 728 .007045173
A 69,834,270 1.0201 68,458,259 24 512 .012144958
A 74,286,450 0.9754 76,159,986 18 328 .000912000
D3 49,869,157 0.8898 56,045,355 20 2,332 .073747953
G1 76,913,197 1.0345 74,348,185 14 34 .067366095
Random Totals: 409,295,237   412,039,358 122 5,146  
Catg J Exception Values: 12,587,023   12,537,844      
Catg D1 Exception Values: 3,538,900   3,857,570      
Catg G1 Exception Values: 76,827,456   79,182,603      
Total Test Values (4): 502,248,616   507,617,375      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 25,380,869

Confidence Interval Values (5)

State Lower Limit: 482,236,506 (State Test Value minus Margin of Error Percent)
Local Test Value: 502,248,616 (Within Confidence Interval)
State Upper Limit: 532,998,244 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,581,406,141 (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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