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2009 Confidence Interval Detail
184/Parker
184-909/Brock ISD

Category Summary

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

Stratum
Variance
A 39,293,520 0.9358 41,989,228 12 320 .002058696
A 36,238,210 0.9777 37,064,754 15 193 .001507551
A 37,908,330 0.9876 38,384,295 7 142 .002064345
A 47,150,200 0.9859 47,824,526 6 112 .002356873
C 4,864,120 1.1352 4,284,813 9 138 .011685408
C 5,329,400 0.9952 5,355,105 9 119 .000536119
C 5,043,250 1.0007 5,039,722 9 70 .004070071
C 5,709,280 1.0057 5,676,922 10 42 .006421187
D3 127,203,700 1.0261 123,968,132 20 2,221 .009204240
F1 7,277,360 0.8931 8,148,427 8 23 .052622358
F1 8,444,980 0.9886 8,542,363 7 12 .003182683
F1 4,176,970 0.9618 4,342,868 2 2 .000029893
Random Totals: 328,639,320   330,621,155 114 3,394  
Catg J Exception Values: 3,968,380   3,953,936      
Catg D1 Exception Values: 4,378,390   3,341,426      
Catg F1 Exception Values: 6,036,770   6,119,670      
Total Test Values (4): 343,022,860   344,036,187      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 17,201,809

Confidence Interval Values (5)

State Lower Limit: 326,834,378 (State Test Value minus Margin of Error Percent)
Local Test Value: 343,022,860 (Within Confidence Interval)
State Upper Limit: 361,237,996 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 381,469,178 (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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