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2006 Confidence Interval Detail
020/Brazoria
020-907/Columbia-Brazoria ISD

Category Summary

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

Stratum
Variance
A 121,089,428 0.9852 122,908,473 34 2,062 .046563904
A 121,106,367 0.9678 125,135,738 31 1,279 .013218206
A 120,968,565 0.9741 124,184,955 50 907 .017741452
A 121,053,713 0.9792 123,625,115 28 553 .005019795
D3 58,226,340 0.9194 63,330,803 11 3,492 .099007663
F1 12,172,070 0.8472 14,367,410 7 183 .014429754
F1 12,288,691 0.9306 13,205,127 8 70 .030065787
F1 12,187,897 0.9567 12,739,518 8 25 .021464901
F1 11,986,175 0.8033 14,921,169 5 10 .034461618
G1 15,792,207 0.9800 16,114,497 8 32 .005050296
Random Totals: 606,871,453   630,532,805 190 8,613  
Catg J Exception Values: 36,723,103   38,841,413      
Catg D1 Exception Values: 8,844,820   9,877,370      
Catg G1 Exception Values: 14,538,189   16,382,498      
Total Test Values (4): 666,977,565   695,634,086      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 34,781,704

Confidence Interval Values (5)

State Lower Limit: 660,852,382 (State Test Value minus Margin of Error Percent)
Local Test Value: 666,977,565 (Within Confidence Interval)
State Upper Limit: 730,415,790 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 664,486,570 (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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