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2009 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 521,500 0.9226 565,250 7 37 .041661412
A 445,270 1.0729 415,015 5 14 .008780082
A 565,630 0.9324 606,639 4 13 .014579474
A 494,580 1.0721 461,319 5 8 .007948780
D3 10,152,490 0.9627 10,545,850 16 1,018 .029577025
G1 641,351 1.0126 633,371 3 5 .000005171
Random Totals: 12,820,821   13,227,444 40 1,095  
Catg J Exception Values: 428,975   427,624      
Catg D1 Exception Values: 3,179,180   2,994,417      
Catg G1 Exception Values: 907,209   891,330      
Total Test Values (4): 17,336,185   17,540,815      

Margin of Error

Margin of Error Percent: 5.2416607
Margin of Error Value: 919,430

Confidence Interval Values (5)

State Lower Limit: 16,621,385 (State Test Value minus Margin of Error Percent)
Local Test Value: 17,336,185 (Within Confidence Interval)
State Upper Limit: 18,460,245 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 29,334,693 (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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