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2008 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 54,340,288 1.0189 53,332,307 16 849 .042480419
A 55,032,320 1.0303 53,413,879 17 464 .037783438
A 59,389,500 1.0388 57,171,255 13 358 .017542527
A 70,892,680 0.9800 72,339,469 15 275 .007726239
D3 244,676,609 1.0171 240,562,982 58 7,207 .018578109
F1 16,237,480 0.8961 18,120,165 7 164 .175273202
F1 16,518,320 0.7804 21,166,479 6 56 .021033065
F1 12,845,420 0.8742 14,693,914 6 18 .075620181
F1 23,073,660 0.9049 25,498,574 4 15 .010533758
G1 7,154,313 0.7821 9,147,568 5 16 .042971974
G1 6,230,533 1.0228 6,091,644 4 7 .013126574
G1 6,970,420 1.3224 5,271,038 3 5 .090893127
Random Totals: 573,361,543   576,809,274 154 9,434  
Catg J Exception Values: 20,408,533   20,511,178      
Catg D1 Exception Values: 23,662,888   21,247,948      
Catg G1 Exception Values: 26,358,786   24,508,218      
Total Test Values (4): 643,791,750   643,076,618      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 32,153,831

Confidence Interval Values (5)

State Lower Limit: 610,922,787 (State Test Value minus Margin of Error Percent)
Local Test Value: 643,791,750 (Within Confidence Interval)
State Upper Limit: 675,230,449 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 704,594,557 (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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