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2011 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 18,844,480 0.9773 19,282,186 11 551 .016190902
A 18,366,450 0.9465 19,404,596 12 307 .005348060
A 19,744,650 0.9434 20,929,245 11 224 .013544067
A 18,842,790 0.9875 19,081,306 10 133 .002764099
D3 127,487,840 0.9702 131,403,669 19 3,248 .021081464
F1 5,286,460 0.9365 5,644,912 12 91 .010273931
F1 4,772,150 0.9541 5,001,729 9 31 .009718155
F1 5,173,860 0.9556 5,414,253 11 16 .006791024
F1 4,894,380 0.9900 4,943,818 5 7 .001707577
Random Totals: 223,413,060   231,105,714 100 4,608  
Catg D1 Exception Values: 14,908,960   13,488,659      
Total Test Values (4): 238,322,020   244,594,373      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 12,229,719

Confidence Interval Values (5)

State Lower Limit: 232,364,654 (State Test Value minus Margin of Error Percent)
Local Test Value: 238,322,020 (Within Confidence Interval)
State Upper Limit: 256,824,092 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 250,988,776 (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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