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2007 Confidence Interval Detail
043/Collin
043-918/Community ISD

Category Summary

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

Stratum
Variance
A 63,407,591 1.0054 63,067,029 24 729 .001200560
A 63,207,689 1.0082 62,693,601 25 384 .007029713
A 63,377,335 0.9986 63,466,188 24 295 .000845437
A 63,142,638 0.9754 64,735,122 24 217 .007843971
C 6,786,836 0.9666 7,021,349 11 332 .088953148
C 4,884,579 0.9100 5,367,669 7 136 .026112581
C 5,927,411 1.0866 5,455,007 8 120 .026698112
C 5,707,140 0.9912 5,757,809 6 46 .000862238
D3 99,492,171 0.7742 128,509,650 22 2,530 .323872054
Random Totals: 375,933,390   406,073,424 151 4,789  
Catg D1 Exception Values: 4,215,265   4,022,591      
Total Test Values (4): 380,148,655   410,096,015      

Margin of Error

Margin of Error Percent: 7.4682099
Margin of Error Value: 30,626,831

Confidence Interval Values (5)

State Lower Limit: 379,469,184 (State Test Value minus Margin of Error Percent)
Local Test Value: 380,148,655 (Within Confidence Interval)
State Upper Limit: 440,722,846 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 409,340,030 (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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