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2008 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 585,392,987 1.0073 581,150,588 49 4,140 .012472132
A 623,243,514 1.0048 620,266,236 40 2,335 .014415196
A 573,643,191 1.0003 573,471,150 38 1,487 .014919020
A 734,630,660 0.9840 746,575,874 29 1,074 .056157869
C 72,378,310 0.8003 90,438,973 13 1,216 .049805137
C 89,170,305 0.8909 100,090,139 12 495 .026631511
C 63,390,701 0.9608 65,976,999 12 261 .055565561
C 70,407,304 0.9771 72,057,419 7 82 .001119564
F1 69,305,183 0.9354 74,091,493 8 264 .053857419
F1 63,675,191 0.8570 74,300,106 7 76 .023582777
F1 91,166,837 0.9850 92,555,164 6 51 .010580863
F1 70,769,898 1.0095 70,103,911 4 13 .002832485
Random Totals: 3,107,174,081   3,161,078,052 225 11,494  
Catg D1 Exception Values: 1,496,353   1,522,897      
Total Test Values (4): 3,108,670,434   3,162,600,949      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 158,130,047

Confidence Interval Values (5)

State Lower Limit: 3,004,470,902 (State Test Value minus Margin of Error Percent)
Local Test Value: 3,108,670,434 (Within Confidence Interval)
State Upper Limit: 3,320,730,996 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,585,253,361 (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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