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2009 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 254,783,296 1.0029 254,046,561 49 1,459 .003883883
A 289,084,306 0.9771 295,859,488 48 1,003 .013318571
A 280,155,599 0.9874 283,730,605 48 645 .002392115
A 251,881,513 0.9984 252,285,169 24 339 .001637787
D3 115,464,531 0.9836 117,389,722 10 917 .003021956
F1 18,104,197 0.9556 18,945,371 7 101 .001964612
F1 18,777,193 0.8724 21,523,605 6 17 .020017091
F1 20,798,940 0.9498 21,898,231 6 10 .009312464
Random Totals: 1,249,049,575   1,265,678,752 198 4,491  
Catg D1 Exception Values: 3,124,128   3,088,866      
Catg F1 Exception Values: 38,739,810   43,488,129      
Total Test Values (4): 1,290,913,513   1,312,255,747      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 65,612,787

Confidence Interval Values (5)

State Lower Limit: 1,246,642,960 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,290,913,513 (Within Confidence Interval)
State Upper Limit: 1,377,868,534 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,646,196,731 (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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