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2007 Confidence Interval Detail
070/Ellis
070-908/Midlothian ISD

Category Summary

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

Stratum
Variance
A 365,657,276 0.9607 380,615,464 12 2,858 .014179743
A 365,506,595 0.9046 404,053,278 8 2,026 .035454040
A 365,720,783 0.8930 409,541,750 7 1,483 .013131409
A 365,239,187 1.0147 359,947,952 8 943 .007792170
D3 98,614,326 0.9343 105,548,888 10 2,181 .023056898
Random Totals: 1,560,738,167   1,659,707,332 45 9,491  
Catg D1 Exception Values: 4,716,983   3,764,715      
Total Test Values (4): 1,565,455,150   1,663,472,047      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 83,173,602

Confidence Interval Values (5)

Local Test Value: 1,565,455,150 (Outside Confidence Interval)
State Lower Limit: 1,580,298,445 (State Test Value minus Margin of Error Percent)
State Upper Limit: 1,746,645,649 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,291,000,891 (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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