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2008 Confidence Interval Detail
070/Ellis
070-911/Red Oak ISD

Category Summary

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

Stratum
Variance
A 227,879,061 1.0059 226,542,460 32 2,174 .003519477
A 254,411,146 1.0067 252,717,936 60 1,858 .003310792
A 265,153,559 1.0071 263,284,241 67 1,506 .002522186
A 267,227,434 1.0011 266,933,807 44 973 .002099459
F1 18,543,400 0.8992 20,622,109 9 106 .034664461
F1 20,039,350 0.8310 24,114,741 9 40 .032099483
F1 17,939,014 1.0156 17,663,464 5 18 .037239744
Random Totals: 1,071,192,964   1,071,878,758 226 6,675  
Catg D1 Exception Values: 1,552,736   1,330,696      
Catg F1 Exception Values: 21,139,080   21,387,744      
Total Test Values (4): 1,093,884,780   1,094,597,198      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 54,729,860

Confidence Interval Values (5)

State Lower Limit: 1,039,867,338 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,093,884,780 (Within Confidence Interval)
State Upper Limit: 1,149,327,058 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,192,345,374 (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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