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2009 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 649,495,923 1.0055 645,943,235 77 4,274 .029318581
A 617,714,885 0.9840 627,759,029 55 2,190 .026359882
A 560,020,502 0.9045 619,149,256 32 1,382 .025599315
A 667,267,962 0.9566 697,541,252 25 893 .047553086
C 115,593,913 1.0030 115,248,168 17 1,517 .020925473
C 31,713,161 0.9239 34,325,318 7 187 .006287118
C 58,630,185 0.9211 63,652,356 8 239 .021110162
C 56,286,147 0.9509 59,192,499 6 73 .008719529
F1 71,732,570 1.0035 71,482,382 7 241 .000834879
F1 73,620,683 0.9678 76,070,142 8 77 .002662028
F1 81,118,897 0.9134 88,809,828 10 40 .051755760
F1 46,677,059 0.9913 47,086,713 7 8 .004021411
Random Totals: 3,029,871,887   3,146,260,178 259 11,121  
Catg D1 Exception Values: 1,879,503   1,752,219      
Total Test Values (4): 3,031,751,390   3,148,012,397      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 157,400,620

Confidence Interval Values (5)

State Lower Limit: 2,990,611,777 (State Test Value minus Margin of Error Percent)
Local Test Value: 3,031,751,390 (Within Confidence Interval)
State Upper Limit: 3,305,413,017 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,543,836,454 (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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