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2006 Confidence Interval Detail
072/Erath
072-902/Dublin ISD

Category Summary

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

Stratum
Variance
A 15,629,106 0.9232 16,929,274 16 537 .140254759
A 15,592,830 0.9063 17,204,932 17 291 .035158990
A 15,615,721 1.0351 15,086,196 16 198 .019755608
A 15,412,049 0.9199 16,754,048 13 125 .022609845
D3 105,885,000 0.9974 106,161,019 21 3,724 .074598307
F1 4,297,404 0.6453 6,659,544 10 94 .147848074
F1 4,231,221 1.0122 4,180,222 7 33 .042715601
F1 4,640,301 0.8911 5,207,385 6 17 .124848860
F1 3,501,094 0.8041 4,354,053 3 6 .003420402
L1 3,759,397 0.9868 3,809,685 8 93 .041077354
L1 4,215,431 1.0286 4,098,222 6 20 .001174034
L1 4,221,325 1.0063 4,194,897 4 7 .000065397
Random Totals: 197,000,879   204,639,477 127 5,145  
Catg J Exception Values: 9,075,630   10,472,930      
Catg D1 Exception Values: 18,349,180   14,954,101      
Catg L1 Exception Values: 1,713,279   1,713,279      
Total Test Values (4): 226,138,968   231,779,787      

Margin of Error

Margin of Error Percent: 5.7071025
Margin of Error Value: 13,227,910

Confidence Interval Values (5)

State Lower Limit: 218,551,877 (State Test Value minus Margin of Error Percent)
Local Test Value: 226,138,968 (Within Confidence Interval)
State Upper Limit: 245,007,697 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 217,720,450 (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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