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2007 Confidence Interval Detail
043/Collin
043-912/Prosper ISD

Category Summary

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

Stratum
Variance
A 201,041,426 0.9733 206,556,484 24 997 .002101400
A 201,115,820 1.0093 199,262,677 24 616 .001305903
A 201,041,233 0.9976 201,524,893 25 403 .005606979
A 200,691,450 1.0003 200,631,261 25 252 .001459163
D3 159,468,691 0.8776 181,709,994 13 1,198 .073586594
Random Totals: 963,358,620   989,685,309 111 3,466  
Catg D1 Exception Values: 4,001,150   3,852,252      
Total Test Values (4): 967,359,770   993,537,561      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 49,676,878

Confidence Interval Values (5)

State Lower Limit: 943,860,683 (State Test Value minus Margin of Error Percent)
Local Test Value: 967,359,770 (Within Confidence Interval)
State Upper Limit: 1,043,214,439 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,360,309,165 (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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