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2006 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 10,917,936 0.9670 11,290,523 11 201 .003009522
A 10,931,431 0.9678 11,295,134 11 127 .007667261
A 10,895,938 0.9953 10,947,391 8 95 .014031927
A 10,857,417 0.9664 11,234,910 9 60 .006024483
D3 61,209,164 0.9433 64,888,332 20 2,356 .005801364
Random Totals: 104,811,886   109,656,290 59 2,839  
Catg J Exception Values: 9,788,895   10,385,220      
Catg D1 Exception Values: 16,259,235   16,455,640      
Total Test Values (4): 130,860,016   136,497,150      

Margin of Error

Margin of Error Percent: 5.0000004
Margin of Error Value: 6,824,858

Confidence Interval Values (5)

State Lower Limit: 129,672,292 (State Test Value minus Margin of Error Percent)
Local Test Value: 130,860,016 (Within Confidence Interval)
State Upper Limit: 143,322,008 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 130,833,919 (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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