taxes Property Tax

School and Appraisal Districts Property Value Study 2013 Report

2013 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 27,394,656 0.9148 29,946,060 10 447 .122878948
A 27,141,766 1.0037 27,041,712 11 277 .017240829
A 30,587,074 1.0493 29,149,980 12 238 .018982711
A 31,087,069 1.0600 29,327,424 12 164 .011598243
E 92,292,254 0.9534 96,803,287 15 948 .046439663
Random Totals: 208,502,819   212,268,463 60 2,074  
Catg J Exception Values: 5,919,757   5,703,596      
Catg D1 Exception Values: 10,564,724   11,529,950      
Total Test Values (4): 224,987,300   229,502,009      

Margin of Error

Margin of Error Percent: 5.6791939
Margin of Error Value: 13,033,864

Confidence Interval Values (5)

State Lower Limit: 216,468,145 (State Test Value minus Margin of Error Percent)
Local Test Value: 224,987,300 (Within Confidence Interval)
State Upper Limit: 242,535,873 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 267,491,637 (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