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2011 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 25,548,081 1.0169 25,123,494 10 419 .024023921
A 27,655,616 0.9953 27,786,211 10 290 .002480646
A 29,850,399 1.0163 29,371,641 11 235 .007880121
A 29,546,311 0.9557 30,915,885 10 157 .008185755
D3 89,475,361 0.9872 90,635,495 15 2,334 .010547976
Random Totals: 202,075,768   203,832,726 56 3,435  
Catg J Exception Values: 5,131,572   5,493,131      
Catg D1 Exception Values: 9,949,913   14,046,010      
Total Test Values (4): 217,157,253   223,371,867      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 11,168,593

Confidence Interval Values (5)

State Lower Limit: 212,203,274 (State Test Value minus Margin of Error Percent)
Local Test Value: 217,157,253 (Within Confidence Interval)
State Upper Limit: 234,540,460 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 247,309,008 (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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