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2007 Confidence Interval Detail
246/Williamson
246-912/Thrall ISD

Category Summary

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

Stratum
Variance
A 11,803,887 0.8952 13,185,754 8 207 .020460372
A 11,845,660 0.9660 12,262,588 8 128 .009401411
A 11,743,693 1.0096 11,632,026 7 97 .006161901
A 11,784,303 0.9730 12,111,308 7 58 .010963841
D3 58,441,344 0.9552 61,182,312 17 2,379 .015439436
Random Totals: 105,618,887   110,373,988 47 2,869  
Catg J Exception Values: 9,401,077   9,253,332      
Catg D1 Exception Values: 16,279,828   16,291,185      
Total Test Values (4): 131,299,792   135,918,505      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 6,795,925

Confidence Interval Values (5)

State Lower Limit: 129,122,580 (State Test Value minus Margin of Error Percent)
Local Test Value: 131,299,792 (Within Confidence Interval)
State Upper Limit: 142,714,430 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 135,476,319 (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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