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2008 Confidence Interval Detail
014/Bell
014-910/Troy ISD

Category Summary

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

Stratum
Variance
A 22,039,218 1.0033 21,966,728 11 377 .017334432
A 26,238,721 1.0124 25,917,346 14 295 .007707128
A 25,700,028 1.0147 25,327,711 13 212 .017824761
A 31,722,203 0.9842 32,231,460 13 186 .005351938
D3 80,878,592 0.9995 80,919,052 20 2,270 .013688577
Random Totals: 186,578,762   186,362,297 71 3,340  
Catg J Exception Values: 21,496,333   21,382,993      
Catg D1 Exception Values: 9,491,904   8,118,252      
Total Test Values (4): 217,566,999   215,863,542      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 10,793,177

Confidence Interval Values (5)

State Lower Limit: 205,070,365 (State Test Value minus Margin of Error Percent)
Local Test Value: 217,566,999 (Within Confidence Interval)
State Upper Limit: 226,656,719 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 221,534,592 (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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