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2007 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 131,472,120 1.0009 131,353,901 31 2,091 .009974073
A 131,384,382 1.0150 129,442,741 47 1,292 .008071177
A 131,399,815 0.9895 132,794,154 37 909 .004008616
A 131,298,815 1.0004 131,246,316 25 553 .007254420
D3 62,596,280 0.9890 63,292,497 22 3,456 .007780944
F1 12,806,174 0.7567 16,923,713 8 183 .078112615
F1 12,791,030 0.9217 13,877,650 7 67 .034342993
F1 13,334,850 0.8063 16,538,323 7 26 .047672961
F1 12,218,049 0.8243 14,822,333 4 9 .029935446
Random Totals: 639,301,515   650,291,628 188 8,586  
Catg J Exception Values: 37,070,143   35,754,175      
Catg D1 Exception Values: 9,032,889   9,644,514      
Total Test Values (4): 685,404,547   695,690,317      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 34,784,516

Confidence Interval Values (5)

State Lower Limit: 660,905,801 (State Test Value minus Margin of Error Percent)
Local Test Value: 685,404,547 (Within Confidence Interval)
State Upper Limit: 730,474,833 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 741,684,872 (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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