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2007 Confidence Interval Detail
178/Nueces
178-909/Robstown ISD

Category Summary

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

Stratum
Variance
A 42,471,078 0.9603 44,226,885 11 1,578 .042234290
A 42,488,339 0.8847 48,025,702 12 1,001 .043619916
A 42,469,131 0.9731 43,643,131 9 626 .005576984
A 42,419,998 1.0061 42,162,805 9 348 .002555080
D3 12,047,325 1.0420 11,561,732 13 1,037 .078002573
F1 9,912,296 0.9242 10,725,272 7 179 .004878543
F1 10,086,213 0.9013 11,190,739 7 51 .009311089
F1 10,049,113 0.9161 10,969,450 5 20 .003349995
F1 9,431,416 0.9743 9,680,197 4 7 .002403367
L1 11,177,182 0.9894 11,296,929 8 140 .014318835
L1 11,023,810 0.9769 11,284,482 5 22 .005229571
L1 11,464,318 0.9961 11,509,204 4 7 .002270308
L1 10,551,093 0.9971 10,581,780 2 3 .000091718
Random Totals: 265,591,312   276,858,308 96 5,019  
Catg J Exception Values: 12,808,016   13,210,116      
Catg D1 Exception Values: 14,972,795   15,387,531      
Total Test Values (4): 293,372,123   305,455,955      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 15,272,798

Confidence Interval Values (5)

State Lower Limit: 290,183,157 (State Test Value minus Margin of Error Percent)
Local Test Value: 293,372,123 (Within Confidence Interval)
State Upper Limit: 320,728,753 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 276,227,370 (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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