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2008 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 43,700,878 0.8398 52,037,245 11 1,643 .232938600
A 38,083,013 0.9373 40,630,548 9 897 .070055497
A 41,310,058 0.9792 42,187,559 10 611 .095085342
A 38,523,815 1.0113 38,093,360 9 325 .017940472
D3 11,937,174 0.9335 12,787,546 16 1,057 .041362806
F1 10,253,745 0.8771 11,690,508 7 185 .049252678
F1 11,310,867 1.0853 10,421,881 6 56 .031889227
F1 10,461,066 0.9201 11,369,488 5 21 .023602183
F1 10,040,399 0.9649 10,405,637 4 9 .006943823
L1 10,812,788 1.1115 9,728,104 8 144 .027757274
L1 14,370,517 0.9755 14,731,437 6 23 .011072030
L1 13,894,463 1.0020 13,866,730 3 7 .005718912
Random Totals: 254,698,783   267,950,043 94 4,978  
Catg J Exception Values: 14,330,368   14,618,732      
Catg D1 Exception Values: 14,980,195   16,089,891      
Catg L1 Exception Values: 15,479,254   18,909,279      
Total Test Values (4): 299,488,600   317,567,945      

Margin of Error

Margin of Error Percent: 6.0080122
Margin of Error Value: 19,079,521

Confidence Interval Values (5)

State Lower Limit: 298,488,424 (State Test Value minus Margin of Error Percent)
Local Test Value: 299,488,600 (Within Confidence Interval)
State Upper Limit: 336,647,466 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 299,567,492 (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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