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2010 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 38,527,671 0.9734 39,580,513 15 1,323 .009042251
A 60,400,954 0.9405 64,222,173 15 1,249 .003861401
A 58,626,935 0.9725 60,284,766 15 792 .006030517
A 58,127,241 0.9776 59,459,125 15 469 .003835913
F1 11,339,576 0.9594 11,819,445 9 183 .014107197
F1 11,547,769 0.9585 12,047,751 8 53 .012851195
F1 13,068,772 0.9681 13,499,403 7 24 .006157593
F1 9,280,494 1.0123 9,167,731 5 7 .007412932
L1 15,030,712 1.0162 14,791,096 9 122 .049954577
L1 9,411,155 0.9128 10,310,205 6 11 .026667716
L1 19,386,056 1.0021 19,345,431 3 9 .000311956
L1 21,314,860 0.9536 22,351,992 2 2 .064055560
Random Totals: 326,062,195   336,879,631 109 4,244  
Catg J Exception Values: 13,838,894   13,010,975      
Catg D1 Exception Values: 15,520,379   16,861,666      
Total Test Values (4): 355,421,468   366,752,272      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 18,337,614

Confidence Interval Values (5)

State Lower Limit: 348,414,658 (State Test Value minus Margin of Error Percent)
Local Test Value: 355,421,468 (Within Confidence Interval)
State Upper Limit: 385,089,886 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 337,016,590 (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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