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2010 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 71,901,056 0.9676 74,308,656 15 1,202 .031069765
A 68,862,020 0.8702 79,133,556 16 686 .021716690
A 70,595,881 0.9525 74,116,410 17 509 .019690726
A 78,215,633 0.9558 81,832,635 16 358 .006524812
D3 51,517,315 0.9563 53,871,500 20 2,351 .064736761
G1 40,563,849 0.9379 43,249,652 16 35 .168971722
Random Totals: 381,655,754   406,512,409 100 5,141  
Catg J Exception Values: 12,761,554   12,809,525      
Catg D1 Exception Values: 3,518,365   3,555,274      
Catg G1 Exception Values: 81,779,264   83,789,207      
Total Test Values (4): 479,714,937   506,666,415      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 25,333,321

Confidence Interval Values (5)

Local Test Value: 479,714,937 (Outside Confidence Interval)
State Lower Limit: 481,333,094 (State Test Value minus Margin of Error Percent)
State Upper Limit: 531,999,736 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,343,741,238 (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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