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2006 Confidence Interval Detail
227/Travis
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 707,912 1.0980 644,729 3 4 .002236502
D3 2,610,828 1.0286 2,538,234 11 68 .029120745
Random Totals: 3,318,740   3,182,963 14 72  
Catg J Exception Values: 209,917   214,651      
Catg D1 Exception Values: 392,930   362,427      
Total Test Values (4): 3,921,587   3,760,041      

Margin of Error

Margin of Error Percent: 6.9351637
Margin of Error Value: 260,765

Confidence Interval Values (5)

State Lower Limit: 3,499,276 (State Test Value minus Margin of Error Percent)
Local Test Value: 3,921,587 (Within Confidence Interval)
State Upper Limit: 4,020,806 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,372,657 (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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