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2007 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 17,993,374 0.7374 24,401,104 7 540 .072211572
A 17,918,198 0.8626 20,772,314 14 299 .026978510
A 17,974,145 0.9761 18,414,245 10 202 .044468332
A 17,871,203 0.9992 17,885,511 9 127 .015539070
D3 127,073,984 0.8750 145,227,410 12 3,753 .092760038
F1 4,839,881 0.7025 6,889,510 11 91 .089348698
F1 4,771,721 0.7854 6,075,530 8 33 .070733087
F1 4,702,350 0.7258 6,478,851 5 15 .040058208
F1 4,754,241 0.8561 5,553,371 5 7 .091712581
L1 4,575,535 0.9723 4,705,888 8 97 .005645561
L1 4,773,182 1.0221 4,669,976 5 19 .000868329
L1 8,432,853 0.9586 8,797,051 4 7 .011419638
Random Totals: 235,680,667   269,870,761 98 5,190  
Catg D1 Exception Values: 18,119,040   14,396,988      
Total Test Values (4): 253,799,707   284,267,749      

Margin of Error

Margin of Error Percent: 9.1685828
Margin of Error Value: 26,063,324

Confidence Interval Values (5)

Local Test Value: 253,799,707 (Outside Confidence Interval)
State Lower Limit: 258,204,425 (State Test Value minus Margin of Error Percent)
State Upper Limit: 310,331,073 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 255,092,689 (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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