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2006 Confidence Interval Detail
031/Cameron
031-909/Point Isabel ISD

Category Summary

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

Stratum
Variance
A 481,823,233 0.9553 504,368,505 42 3,815 .028287028
A 486,344,401 0.9601 506,555,985 28 1,898 .013894532
A 477,122,408 0.9538 500,233,181 48 1,266 .007785298
A 481,717,272 0.9254 520,550,326 45 702 .013698304
C 46,387,230 0.9028 51,381,513 7 1,041 .014512948
C 46,372,796 0.9231 50,235,940 7 501 .010092248
C 46,636,165 0.9919 47,017,003 7 289 .212982559
C 46,104,631 1.0338 44,597,244 6 69 .069119893
F1 58,918,824 1.0246 57,504,220 7 239 .005255163
F1 58,647,191 1.0286 57,016,519 6 76 .022368912
F1 57,796,002 0.9244 62,522,720 6 35 .008403477
F1 58,339,626 0.9143 63,807,969 4 10 .007118408
Random Totals: 2,346,209,779   2,465,791,125 213 9,941  
Catg D1 Exception Values: 1,372,865   1,361,002      
Total Test Values (4): 2,347,582,644   2,467,152,127      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 123,357,606

Confidence Interval Values (5)

State Lower Limit: 2,343,794,521 (State Test Value minus Margin of Error Percent)
Local Test Value: 2,347,582,644 (Within Confidence Interval)
State Upper Limit: 2,590,509,733 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,569,207,092 (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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