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2007 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 56,472,878 1.0372 54,447,433 15 891 .041011135
A 56,531,126 0.9833 57,491,230 12 467 .008388050
A 56,495,178 0.9893 57,106,214 10 329 .029982404
A 56,260,518 0.9741 57,756,409 9 213 .014381954
D3 227,932,764 0.9951 229,055,134 50 7,427 .024692564
F1 15,657,058 0.8491 18,439,593 10 169 .094643932
F1 15,981,067 0.9164 17,438,964 7 52 .019383481
F1 15,048,568 0.8913 16,883,842 5 19 .020863697
F1 15,544,386 0.9795 15,869,715 6 9 .003247781
G1 3,864,091 1.0851 3,561,046 3 11 .015108904
G1 4,661,067 0.9187 5,073,546 5 7 .030686456
G1 4,169,986 0.9823 4,245,125 2 3 .000126654
Random Totals: 528,618,687   537,368,251 134 9,597  
Catg J Exception Values: 22,339,503   21,666,429      
Catg D1 Exception Values: 23,693,831   21,962,373      
Catg G1 Exception Values: 23,283,020   21,644,429      
Total Test Values (4): 597,935,041   602,641,482      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 30,132,074

Confidence Interval Values (5)

State Lower Limit: 572,509,408 (State Test Value minus Margin of Error Percent)
Local Test Value: 597,935,041 (Within Confidence Interval)
State Upper Limit: 632,773,556 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 629,550,902 (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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