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2011 Confidence Interval Detail
240/Webb
240-904/Webb CISD

Category Summary

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

Stratum
Variance
D3 34,451,298 1.1459 30,064,838 15 2,873 .817452011
G1 211,606,514 1.0114 209,221,390 10 490 .119311926
G1 211,977,194 0.9728 217,904,188 10 208 .024886904
G1 213,383,939 1.0312 206,927,792 9 117 .007980565
G1 209,376,670 1.0176 205,755,375 8 50 .009281640
Random Totals: 880,795,615   869,873,583 52 3,738  
Catg D1 Exception Values: 26,335,110   43,039,640      
Total Test Values (4): 907,130,725   912,913,223      

Margin of Error

Margin of Error Percent: 6.0272590
Margin of Error Value: 55,023,644

Confidence Interval Values (5)

State Lower Limit: 857,889,579 (State Test Value minus Margin of Error Percent)
Local Test Value: 907,130,725 (Within Confidence Interval)
State Upper Limit: 967,936,867 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,298,367,849 (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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