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2009 Confidence Interval Detail
043/Collin
043-908/Melissa ISD

Category Summary

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

Stratum
Variance
A 79,201,753 0.9375 84,481,870 45 658 .024982941
A 81,327,503 0.9883 82,290,300 28 431 .013520692
A 84,538,407 1.0116 83,569,007 14 320 .003504525
A 60,474,072 0.9634 62,771,509 7 148 .004238198
D3 38,903,852 0.9928 39,185,991 10 1,100 .000450790
Random Totals: 344,445,587   352,298,677 104 2,657  
Catg D1 Exception Values: 1,755,085   1,642,570      
Total Test Values (4): 346,200,672   353,941,247      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 17,697,062

Confidence Interval Values (5)

State Lower Limit: 336,244,185 (State Test Value minus Margin of Error Percent)
Local Test Value: 346,200,672 (Within Confidence Interval)
State Upper Limit: 371,638,309 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 424,851,524 (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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