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2007 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 6,545,841 0.9532 6,867,227 13 269 .015254688
A 6,518,778 0.9685 6,730,798 13 141 .015963961
A 6,547,308 0.9726 6,731,758 12 85 .012897204
A 6,442,390 0.9491 6,787,894 11 46 .017602185
C 672,079 0.9268 725,161 8 217 .032262020
C 684,935 0.9925 690,111 7 81 .007384069
C 688,635 0.9743 706,800 6 28 .003962428
C 642,224 0.8406 764,007 2 3 .011937754
D3 3,288,859 0.8999 3,654,694 10 630 .078940696
Random Totals: 32,031,049   33,658,450 82 1,500  
Catg J Exception Values: 1,144,286   1,164,963      
Catg D1 Exception Values: 16,910,785   16,447,714      
Catg C Exception Values: 2,049,360   2,049,360      
Total Test Values (4): 52,135,480   53,320,487      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 2,666,024

Confidence Interval Values (5)

State Lower Limit: 50,654,463 (State Test Value minus Margin of Error Percent)
Local Test Value: 52,135,480 (Within Confidence Interval)
State Upper Limit: 55,986,511 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 57,414,537 (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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