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2009 Confidence Interval Detail
039/Clay
005-904/Windthorst ISD

Category Summary

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

Stratum
Variance
A 3,691,810 1.0193 3,621,907 10 40 .001731162
D3 4,839,960 1.0333 4,683,983 10 222 .108884055
Random Totals: 8,531,770   8,305,890 20 262  
Catg D1 Exception Values: 1,202,790   1,204,310      
Total Test Values (4): 9,734,560   9,510,200      

Margin of Error

Margin of Error Percent: 10.5866123
Margin of Error Value: 1,006,808

Confidence Interval Values (5)

State Lower Limit: 8,503,392 (State Test Value minus Margin of Error Percent)
Local Test Value: 9,734,560 (Within Confidence Interval)
State Upper Limit: 10,517,008 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 10,074,490 (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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