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2010 Confidence Interval Detail
043/Collin
043-917/Blue Ridge ISD

Category Summary

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

Stratum
Variance
A 10,286,455 0.8294 12,402,285 12 242 .059222108
A 8,968,339 0.9216 9,731,271 10 131 .046949566
A 10,661,614 0.9850 10,823,974 11 114 .009412640
A 8,877,575 0.9090 9,766,309 11 57 .011757229
D3 73,173,004 0.9814 74,559,817 21 2,496 .067625996
Random Totals: 111,966,987   117,283,656 65 3,040  
Catg J Exception Values: 7,680,730   7,803,912      
Catg D1 Exception Values: 4,283,296   3,938,811      
Total Test Values (4): 123,931,013   129,026,379      

Margin of Error

Margin of Error Percent: 6.7668310
Margin of Error Value: 8,730,997

Confidence Interval Values (5)

State Lower Limit: 120,295,382 (State Test Value minus Margin of Error Percent)
Local Test Value: 123,931,013 (Within Confidence Interval)
State Upper Limit: 137,757,376 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 120,331,581 (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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