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2009 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 70,758,225 1.0226 69,194,431 10 900 .021177046
A 76,655,472 0.9868 77,680,859 26 522 .005512587
A 76,281,580 1.0139 75,235,802 21 412 .003078310
A 70,805,938 1.0289 68,817,123 13 284 .007373750
D3 110,173,829 1.0093 109,158,654 14 2,675 .014804295
Random Totals: 404,675,044   400,086,869 84 4,793  
Catg D1 Exception Values: 4,109,872   4,017,860      
Total Test Values (4): 408,784,916   404,104,729      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 20,205,236

Confidence Interval Values (5)

State Lower Limit: 383,899,493 (State Test Value minus Margin of Error Percent)
Local Test Value: 408,784,916 (Within Confidence Interval)
State Upper Limit: 424,309,965 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 453,397,187 (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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