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2007 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 32,571,913 1.0394 31,337,226 15 240 .021054243
A 32,605,171 1.0042 32,468,802 22 152 .002014579
A 32,535,326 1.0018 32,476,868 16 107 .002989275
A 32,244,706 0.9840 32,769,010 9 68 .000963442
C 4,891,664 0.9853 4,964,644 8 183 .001340321
C 3,759,316 0.9774 3,846,241 8 91 .004214524
C 4,683,231 1.0839 4,320,722 7 86 .047999634
C 3,942,578 1.0038 3,927,653 8 40 .019042349
D3 111,691,820 0.9823 113,704,388 26 2,168 .015378403
Random Totals: 258,925,725   259,815,554 119 3,135  
Catg D1 Exception Values: 4,422,420   3,341,263      
Total Test Values (4): 263,348,145   263,156,817      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 13,157,841

Confidence Interval Values (5)

State Lower Limit: 249,998,976 (State Test Value minus Margin of Error Percent)
Local Test Value: 263,348,145 (Within Confidence Interval)
State Upper Limit: 276,314,658 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 294,009,201 (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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