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2006 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 23,082,998 0.9506 24,282,556 16 436 .028674788
A 23,090,282 0.9586 24,087,505 19 265 .014249379
A 23,070,963 0.9688 23,813,959 16 199 .013520791
A 23,011,840 0.9561 24,068,445 16 128 .028815166
D3 62,254,332 0.8832 70,487,242 23 2,404 .019258787
F1 1,254,811 0.7008 1,790,541 6 33 .046553985
F1 1,320,107 0.7508 1,758,267 6 15 .308243297
F1 2,430,336 0.9244 2,629,096 7 8 .009668792
Random Totals: 159,515,669   172,917,611 109 3,488  
Catg J Exception Values: 20,717,244   22,001,389      
Catg D1 Exception Values: 10,325,142   9,715,764      
Catg F1 Exception Values: 4,575,200   5,569,379      
Total Test Values (4): 195,133,255   210,204,143      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 10,510,207

Confidence Interval Values (5)

Local Test Value: 195,133,255 (Outside Confidence Interval)
State Lower Limit: 199,693,936 (State Test Value minus Margin of Error Percent)
State Upper Limit: 220,714,350 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 189,586,807 (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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