taxes Property Tax

School and Appraisal Districts Property Value Study 2015 Report

2015 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 29,941,245 0.8817 33,958,540 19 504 .056214882
A 29,967,999 0.9333 32,109,717 16 286 .017945057
A 31,926,288 0.9660 33,049,988 18 237 .009538282
A 36,148,991 0.9866 36,639,967 15 179 .004476055
E 103,446,790 1.0202 101,398,540 24 995 .044875038
Random Totals: 231,431,313   237,156,752 92 2,201  
Catg J Exception Values: 6,429,508   6,643,304      
Catg D1 Exception Values: 12,239,783   19,353,051      
Total Test Values (4): 250,100,604   263,153,107      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 13,157,655

Confidence Interval Values (5)

State Lower Limit: 249,995,452 (State Test Value minus Margin of Error Percent)
Local Test Value: 250,100,604 (Within Confidence Interval)
State Upper Limit: 276,310,762 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 281,966,051 (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