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2009 Confidence Interval Detail
045/Colorado
045-902/Columbus ISD

Category Summary

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

Stratum
Variance
A 58,526,040 0.9053 64,648,227 12 852 .019690625
A 59,585,090 0.9894 60,223,459 8 477 .008638221
A 60,994,270 0.9975 61,147,138 15 346 .022341411
A 56,586,130 1.0058 56,259,823 8 206 .003913783
D3 242,755,657 0.9566 253,769,242 31 7,256 .072734927
F1 16,615,800 1.0161 16,352,524 7 156 .001766317
F1 18,442,020 0.9677 19,057,580 6 58 .013404837
F1 17,929,570 0.9548 18,778,351 5 21 .004780810
F1 18,607,820 0.8655 21,499,503 4 10 .018780535
G1 9,630,819 1.0027 9,604,886 5 19 .004073489
G1 9,606,548 1.3839 6,941,649 4 7 .411667364
Random Totals: 569,279,764   588,282,382 105 9,408  
Catg J Exception Values: 20,312,316   21,244,769      
Catg D1 Exception Values: 23,895,590   22,327,119      
Catg G1 Exception Values: 32,426,580   31,713,518      
Total Test Values (4): 645,914,250   663,567,788      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 33,178,389

Confidence Interval Values (5)

State Lower Limit: 630,389,399 (State Test Value minus Margin of Error Percent)
Local Test Value: 645,914,250 (Within Confidence Interval)
State Upper Limit: 696,746,177 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 699,531,938 (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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