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2007 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 69,432,849 1.0981 63,229,987 31 1,225 .042978747
A 69,519,632 1.0280 67,626,101 29 725 .005200578
A 69,588,718 1.0326 67,391,747 15 512 .017374836
A 69,185,014 1.0247 67,517,336 16 310 .008184671
D3 48,184,208 0.9143 52,700,654 12 2,294 .029412846
G1 71,646,217 0.7657 93,569,566 8 34 .142035595
Random Totals: 397,556,638   412,035,391 111 5,100  
Catg J Exception Values: 18,536,410   13,212,572      
Catg D1 Exception Values: 3,522,510   3,716,569      
Catg G1 Exception Values: 82,636,522   82,559,084      
Total Test Values (4): 502,252,080   511,523,616      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 25,576,181

Confidence Interval Values (5)

State Lower Limit: 485,947,435 (State Test Value minus Margin of Error Percent)
Local Test Value: 502,252,080 (Within Confidence Interval)
State Upper Limit: 537,099,797 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,562,450,863 (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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