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2007 Confidence Interval Detail
157/Mason
157-901/Mason ISD

Category Summary

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

Stratum
Variance
A 18,256,379 0.8941 20,418,722 20 346 .025571221
A 18,296,728 0.9272 19,733,313 21 230 .025590852
A 18,312,452 0.9388 19,506,233 22 150 .029145924
A 18,119,952 0.8975 20,189,362 20 88 .008163699
D3 90,821,940 1.0130 89,656,407 34 8,508 .239362701
F1 5,013,273 0.8701 5,761,720 10 87 .018860402
F1 5,050,549 0.9197 5,491,518 11 35 .041289038
F1 5,244,278 0.9217 5,689,788 10 20 .010780727
F1 4,657,207 0.9426 4,940,809 7 8 .004604614
Random Totals: 183,772,758   191,387,872 155 9,472  
Catg J Exception Values: 4,681,183   4,725,010      
Catg D1 Exception Values: 35,845,530   39,460,414      
Total Test Values (4): 224,299,471   235,573,296      

Margin of Error

Margin of Error Percent: 6.3373227
Margin of Error Value: 14,929,040

Confidence Interval Values (5)

State Lower Limit: 220,644,256 (State Test Value minus Margin of Error Percent)
Local Test Value: 224,299,471 (Within Confidence Interval)
State Upper Limit: 250,502,336 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 205,310,137 (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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