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2009 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 35,488,077 0.8757 40,525,382 17 1,394 .054053187
A 40,435,594 0.9596 42,137,968 17 972 .007216346
A 52,696,914 0.9404 56,036,701 19 792 .036378488
A 53,226,507 1.0331 51,521,157 18 455 .028260840
D3 11,381,963 0.9755 11,667,825 12 1,042 .003619494
F1 10,457,346 0.9409 11,114,195 7 177 .004012726
F1 10,478,443 0.8536 12,275,589 9 52 .026959745
F1 8,350,345 0.8596 9,714,222 8 19 .021565179
F1 15,615,646 0.9221 16,934,873 5 15 .023226269
L1 10,635,598 1.0367 10,259,089 7 127 .011767226
L1 11,634,188 0.9782 11,893,466 5 21 .001656752
L1 7,941,258 0.9264 8,572,170 4 6 .013555953
L1 23,205,053 0.9740 23,824,490 3 6 .001784710
Random Totals: 291,546,932   306,477,127 131 5,078  
Catg J Exception Values: 13,386,568   13,437,369      
Catg D1 Exception Values: 15,609,979   16,469,367      
Catg L1 Exception Values: 21,338,822   22,890,590      
Total Test Values (4): 341,882,301   359,274,453      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 17,963,723

Confidence Interval Values (5)

State Lower Limit: 341,310,730 (State Test Value minus Margin of Error Percent)
Local Test Value: 341,882,301 (Within Confidence Interval)
State Upper Limit: 377,238,176 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 331,505,523 (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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