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2006 Confidence Interval Detail
031/Cameron
031-901/Brownsville ISD

Category Summary

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

Stratum
Variance
A 685,680,626 0.9356 732,877,967 39 15,248 .056060102
A 685,524,846 0.9878 693,991,543 62 9,058 .017557494
A 685,650,085 0.9758 702,654,320 56 6,362 .038940555
A 685,498,047 0.9917 691,235,300 68 3,429 .016808366
C 64,986,212 1.0691 60,785,906 9 4,488 .021030428
C 65,009,443 0.9516 68,315,934 8 1,750 .009380660
C 65,184,818 0.9992 65,237,008 8 503 .008077204
C 64,707,416 0.9488 68,199,216 7 106 .011071755
F1 238,505,599 0.9246 257,955,439 10 1,129 .035535127
F1 238,740,125 0.9470 252,101,505 7 352 .013329865
F1 238,641,055 0.9354 255,121,932 7 125 .022616945
F1 238,099,105 0.9616 247,607,222 6 33 .005314404
L1 84,923,815 0.9670 87,821,939 7 1,200 .022931823
L1 84,790,311 1.0164 83,422,187 8 276 .016966855
L1 87,325,239 0.9446 92,446,791 6 87 .005507335
L1 82,095,881 1.0214 80,375,838 6 16 .002341188
Random Totals: 4,295,362,623   4,440,150,047 314 44,162  
Catg D1 Exception Values: 4,993,048   4,936,748      
Total Test Values (4): 4,300,355,671   4,445,086,795      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 222,254,340

Confidence Interval Values (5)

State Lower Limit: 4,222,832,455 (State Test Value minus Margin of Error Percent)
Local Test Value: 4,300,355,671 (Within Confidence Interval)
State Upper Limit: 4,667,341,135 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 4,401,608,383 (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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