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2009 Confidence Interval Detail
025/Brown
025-902/Brownwood ISD

Category Summary

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

Stratum
Variance
A 108,387,750 1.0099 107,325,230 27 2,992 .121803048
A 104,540,775 0.8225 127,101,246 17 1,429 .057684553
A 108,472,600 0.8778 123,573,251 16 908 .104241188
A 111,986,350 0.9572 116,993,679 14 447 .019775789
D3 45,722,810 0.8361 54,685,815 22 1,597 .144828448
F1 43,173,730 0.9848 43,840,100 10 362 .134094540
F1 42,738,190 0.9104 46,944,409 9 102 .033239323
F1 44,199,780 0.9027 48,963,975 6 35 .060527302
F1 45,715,360 0.9411 48,576,517 3 8 .000230621
L1 22,786,790 1.0048 22,677,936 8 314 .001980673
L1 25,867,690 1.0147 25,492,944 6 86 .005711635
L1 28,104,310 1.0023 28,039,818 9 30 .001550667
Random Totals: 731,696,135   794,214,920 147 8,310  
Catg J Exception Values: 36,147,320   35,546,486      
Catg D1 Exception Values: 4,911,666   5,025,621      
Catg L1 Exception Values: 24,585,050   24,200,489      
Total Test Values (4): 797,340,171   858,987,516      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 42,949,376

Confidence Interval Values (5)

Local Test Value: 797,340,171 (Outside Confidence Interval)
State Lower Limit: 816,038,140 (State Test Value minus Margin of Error Percent)
State Upper Limit: 901,936,892 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,066,118,150 (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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