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2009 Confidence Interval Detail
014/Bell
014-901/Academy ISD

Category Summary

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

Stratum
Variance
A 32,092,950 0.9690 33,119,659 7 431 .000562351
A 37,526,805 0.9751 38,485,084 23 312 .002888400
A 38,552,481 1.0093 38,197,247 16 232 .002376701
A 34,936,231 1.0606 32,940,063 7 89 .004306426
D3 50,381,323 1.0061 50,075,860 15 1,349 .020785135
Random Totals: 193,489,790   192,817,913 68 2,413  
Catg J Exception Values: 15,053,616   15,020,944      
Catg D1 Exception Values: 5,879,246   5,115,443      
Total Test Values (4): 214,422,652   212,954,300      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 10,647,715

Confidence Interval Values (5)

State Lower Limit: 202,306,585 (State Test Value minus Margin of Error Percent)
Local Test Value: 214,422,652 (Within Confidence Interval)
State Upper Limit: 223,602,015 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 213,597,161 (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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