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2006 Confidence Interval Detail
246/Williamson
246-914/Coupland ISD

Category Summary

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

Stratum
Variance
A 3,644,808 0.9983 3,651,015 7 57 .010199485
A 3,609,744 1.0180 3,545,917 8 38 .009689380
A 3,559,643 0.9773 3,642,324 6 27 .001082748
A 3,552,843 0.9904 3,587,281 6 18 .001680062
D3 21,834,866 1.0145 21,522,786 24 759 .020957193
Random Totals: 36,201,904   35,949,323 51 899  
Catg J Exception Values: 4,836,990   4,883,393      
Catg D1 Exception Values: 4,558,560   4,613,918      
Total Test Values (4): 45,597,454   45,446,634      

Margin of Error

Margin of Error Percent: 5.0000007
Margin of Error Value: 2,272,332

Confidence Interval Values (5)

State Lower Limit: 43,174,302 (State Test Value minus Margin of Error Percent)
Local Test Value: 45,597,454 (Within Confidence Interval)
State Upper Limit: 47,718,966 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 45,931,698 (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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