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2009 Confidence Interval Detail
158/Matagorda
158-904/Matagorda ISD

Category Summary

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

Stratum
Variance
A 45,212,872 1.0208 44,291,607 9 450 .014544433
A 40,697,600 1.0590 38,430,217 11 227 .017054277
A 44,741,213 1.0846 41,251,349 10 180 .033477537
A 41,942,608 0.9751 43,013,648 8 108 .004619539
C 7,249,944 0.9940 7,293,706 7 309 .015864431
C 7,276,020 0.9787 7,434,372 6 96 .009508622
C 6,107,050 0.8946 6,826,571 6 52 .086063262
C 7,165,330 1.0263 6,981,711 7 37 .000772169
D3 11,152,650 0.8679 12,850,156 10 1,284 .021645504
G1 1,371,640 2.8757 476,976 5 20 1.203391875
Random Totals: 212,916,927   208,850,313 79 2,763  
Catg D1 Exception Values: 2,470,040   2,887,129      
Catg G1 Exception Values: 3,475,790   3,347,409      
Total Test Values (4): 218,862,757   215,084,851      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 10,754,243

Confidence Interval Values (5)

State Lower Limit: 204,330,608 (State Test Value minus Margin of Error Percent)
Local Test Value: 218,862,757 (Within Confidence Interval)
State Upper Limit: 225,839,094 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 231,862,247 (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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