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2006 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 42,026,735 0.9229 45,537,691 13 1,586 .028267299
A 42,021,743 1.0475 40,116,222 14 983 .014725289
A 42,052,669 0.9815 42,845,307 13 615 .008515236
A 41,943,872 1.0152 41,315,871 13 340 .011011320
D3 11,418,859 0.9322 12,249,366 14 1,048 .009383640
F1 9,507,564 1.0137 9,379,071 8 176 .033215653
F1 9,564,769 0.8685 11,012,975 6 53 .010823783
F1 9,591,867 0.9577 10,015,524 6 23 .004658317
F1 9,026,420 0.9774 9,235,134 5 8 .001964249
L1 8,278,981 0.9507 8,708,300 8 147 .022117774
L1 9,124,613 1.0767 8,474,610 6 21 .026994566
L1 15,631,071 0.9877 15,825,727 4 8 .000206508
Random Totals: 250,189,163   254,715,798 110 5,008  
Catg J Exception Values: 12,698,078   12,393,870      
Catg D1 Exception Values: 15,115,146   14,571,034      
Total Test Values (4): 278,002,387   281,680,702      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 14,084,035

Confidence Interval Values (5)

State Lower Limit: 267,596,667 (State Test Value minus Margin of Error Percent)
Local Test Value: 278,002,387 (Within Confidence Interval)
State Upper Limit: 295,764,737 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 250,649,129 (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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