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2007 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 564,088,640 0.9331 604,531,819 34 3,945 .012094920
A 569,888,910 0.9627 591,969,367 37 1,985 .016199141
A 562,530,271 0.9691 580,466,692 44 1,338 .007770960
A 559,496,527 0.9565 584,941,481 32 758 .009515842
C 75,255,506 0.9765 77,066,570 7 1,063 .012846558
C 73,439,959 0.9152 80,244,710 7 470 .018020988
C 75,017,909 0.9653 77,714,606 7 267 .052095079
C 73,442,500 0.9914 74,079,584 6 82 .002008216
F1 65,314,490 0.9005 72,531,360 7 263 .020865125
F1 65,621,659 0.9261 70,858,070 7 82 .011489903
F1 66,545,902 1.0110 65,821,862 7 38 .006536354
F1 63,060,233 0.9363 67,350,457 4 11 .019240951
Random Totals: 2,813,702,506   2,947,576,578 199 10,302  
Catg D1 Exception Values: 1,377,256   1,442,087      
Total Test Values (4): 2,815,079,762   2,949,018,665      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 147,450,933

Confidence Interval Values (5)

State Lower Limit: 2,801,567,732 (State Test Value minus Margin of Error Percent)
Local Test Value: 2,815,079,762 (Within Confidence Interval)
State Upper Limit: 3,096,469,598 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,092,027,239 (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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