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2008 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 11,234,861 0.9406 11,944,356 7 204 .043568794
A 11,908,051 0.9740 12,225,925 9 129 .025985991
A 12,710,322 0.9649 13,172,683 7 104 .004008205
A 18,355,428 1.0088 18,195,309 7 91 .002578778
D3 70,563,233 0.9645 73,160,428 26 2,409 .116092537
Random Totals: 124,771,895   128,698,701 56 2,937  
Catg J Exception Values: 9,637,109   9,587,054      
Catg D1 Exception Values: 17,791,986   15,227,176      
Total Test Values (4): 152,200,990   153,512,931      

Margin of Error

Margin of Error Percent: 6.5439536
Margin of Error Value: 10,045,815

Confidence Interval Values (5)

State Lower Limit: 143,467,116 (State Test Value minus Margin of Error Percent)
Local Test Value: 152,200,990 (Within Confidence Interval)
State Upper Limit: 163,558,746 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 152,197,952 (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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