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2009 Confidence Interval Detail
246/Williamson
166-905/Thorndale ISD

Category Summary

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

Stratum
Variance
A 2,298,101 0.9611 2,391,115 10 18 .005882739
D3 8,533,908 0.9999 8,534,761 18 279 .015769139
Random Totals: 10,832,009   10,925,876 28 297  
Catg J Exception Values: 834,728   861,414      
Catg D1 Exception Values: 1,770,906   1,359,895      
Total Test Values (4): 13,437,643   13,147,185      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 657,359

Confidence Interval Values (5)

State Lower Limit: 12,489,826 (State Test Value minus Margin of Error Percent)
Local Test Value: 13,437,643 (Within Confidence Interval)
State Upper Limit: 13,804,544 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 11,815,011 (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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