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2010 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 268,057,664 0.9965 268,999,161 50 2,563 .007585052
A 250,646,400 1.0252 244,485,369 52 1,820 .006398289
A 243,327,419 1.0526 231,167,983 53 1,386 .011990383
A 240,323,380 1.0034 239,509,049 26 889 .027911644
F1 19,613,860 1.0325 18,996,475 9 107 .011082030
F1 23,988,879 0.9570 25,066,749 9 45 .009394121
F1 18,564,611 0.9913 18,727,541 8 17 .008079255
F1 17,691,740 0.9612 18,405,888 5 7 .001139134
Random Totals: 1,082,213,953   1,065,358,215 212 6,834  
Catg J Exception Values: 16,673,673   18,149,219      
Catg D1 Exception Values: 1,800,461   1,673,810      
Total Test Values (4): 1,100,688,087   1,085,181,244      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 54,259,062

Confidence Interval Values (5)

State Lower Limit: 1,030,922,182 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,100,688,087 (Within Confidence Interval)
State Upper Limit: 1,139,440,306 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,159,865,494 (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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