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2009 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 18,259,260 1.1494 15,885,906 11 542 .072185502
A 18,308,120 0.9851 18,585,037 7 312 .015879651
A 18,481,870 0.9684 19,084,955 9 214 .016442049
A 18,927,670 1.0133 18,679,236 8 137 .001361639
D3 123,816,880 0.9652 128,281,061 35 3,281 .040413928
F1 5,072,890 1.0515 4,824,432 6 89 .017555637
F1 4,915,600 0.9993 4,919,043 6 32 .003102078
F1 5,323,950 0.9907 5,373,928 6 16 .000779801
F1 5,389,250 1.0213 5,276,853 3 7 .006429959
Random Totals: 218,495,490   220,910,451 91 4,630  
Catg D1 Exception Values: 14,853,990   13,147,704      
Total Test Values (4): 233,349,480   234,058,155      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 11,702,908

Confidence Interval Values (5)

State Lower Limit: 222,355,247 (State Test Value minus Margin of Error Percent)
Local Test Value: 233,349,480 (Within Confidence Interval)
State Upper Limit: 245,761,063 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 245,921,833 (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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