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2009 Confidence Interval Detail
245/Willacy
245-904/San Perlita ISD

Category Summary

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

Stratum
Variance
A 7,013,589 0.8858 7,917,802 12 280 .033755962
A 7,096,289 0.9353 7,587,180 12 142 .015226410
A 8,055,704 0.9733 8,276,692 10 90 .024058779
A 8,804,452 1.0450 8,425,313 9 51 .031436389
C 957,582 1.0581 905,001 7 210 .050714630
C 946,730 0.9023 1,049,241 7 94 .007522602
C 961,549 0.9025 1,065,428 6 39 .034682156
C 751,986 1.0668 704,899 5 15 .011006108
D3 3,830,972 0.9991 3,834,423 10 616 .036574826
F1 4,398,386 0.9916 4,435,645 8 62 .017461059
Random Totals: 42,817,239   44,201,624 86 1,599  
Catg J Exception Values: 1,448,316   1,541,221      
Catg D1 Exception Values: 16,706,081   17,214,035      
Total Test Values (4): 60,971,636   62,956,880      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 3,147,844

Confidence Interval Values (5)

State Lower Limit: 59,809,036 (State Test Value minus Margin of Error Percent)
Local Test Value: 60,971,636 (Within Confidence Interval)
State Upper Limit: 66,104,724 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 63,366,289 (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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