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2010 Confidence Interval Detail
020/Brazoria
020-905/Brazosport ISD

Category Summary

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

Stratum
Variance
A 477,793,724 0.9030 529,118,188 34 6,559 .034017849
A 472,445,426 0.9595 492,387,104 34 3,942 .005513527
A 492,518,531 0.9606 512,719,687 29 3,005 .003954635
A 512,531,717 0.9915 516,925,584 32 1,888 .005264325
F1 110,705,467 0.9837 112,539,867 13 619 .021304236
F1 97,094,145 0.9728 99,808,948 10 161 .013929723
F1 111,149,589 0.9430 117,868,069 11 68 .036283723
F1 76,648,878 1.0421 73,552,325 7 15 .010182156
L1 63,456,430 1.0621 59,746,192 10 610 .013101372
L1 65,179,760 0.9458 68,914,950 9 128 .015862927
L1 59,029,670 0.9826 60,074,975 8 37 .000905370
L1 66,789,190 0.9515 70,193,579 6 14 .002406491
Random Totals: 2,605,342,527   2,713,849,468 203 17,046  
Catg J Exception Values: 77,079,862   69,571,294      
Catg D1 Exception Values: 2,270,789   2,290,643      
Total Test Values (4): 2,684,693,178   2,785,711,405      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 139,285,570

Confidence Interval Values (5)

State Lower Limit: 2,646,425,835 (State Test Value minus Margin of Error Percent)
Local Test Value: 2,684,693,178 (Within Confidence Interval)
State Upper Limit: 2,924,996,975 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 6,416,589,280 (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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