Texas Comptroller of Public Accounts

Texas Comptroller of Public Accounts, Glenn Hegar

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2011 Confidence Interval Detail
072/Erath
018-906/Iredell ISD

Category Summary

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

Stratum
Variance
D3 5,599,480 0.9814 5,705,604 15 167 .010060383
Random Totals: 5,599,480   5,705,604 15 167  
Catg D1 Exception Values: 1,118,030   1,086,638      
Catg F1 Exception Values: 558,730   559,010      
Total Test Values (4): 7,276,240   7,351,252      

Margin of Error

Margin of Error Percent: 5.0000054
Margin of Error Value: 367,563

Confidence Interval Values (5)

State Lower Limit: 6,983,689 (State Test Value minus Margin of Error Percent)
Local Test Value: 7,276,240 (Within Confidence Interval)
State Upper Limit: 7,718,815 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 18,320,108 (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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