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2007 Confidence Interval Detail
062/Dewitt
062-905/Westhoff ISD

Category Summary

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

Stratum
Variance
A 462,853 0.9427 490,987 6 35 .014562484
A 480,005 0.9274 517,581 5 17 .000580667
A 439,815 0.9697 453,558 4 11 .004851891
A 440,861 0.9382 469,901 4 8 .002622439
D3 8,278,360 0.9866 8,390,797 20 1,053 .014384843
Random Totals: 10,101,894   10,322,824 39 1,124  
Catg J Exception Values: 480,140   467,948      
Catg D1 Exception Values: 4,072,770   2,984,519      
Catg G1 Exception Values: 1,867,579   1,864,552      
Total Test Values (4): 16,522,383   15,639,843      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 781,992

Confidence Interval Values (5)

State Lower Limit: 14,857,851 (State Test Value minus Margin of Error Percent)
State Upper Limit: 16,421,835 (State Test Value plus Margin of Error Percent)
Local Test Value: 16,522,383 (Outside Confidence Interval)
Value Assigned (6): 20,158,562 (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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