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2009 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 409,358,250 0.9842 415,929,943 66 3,335 .021177998
A 405,639,996 0.9915 409,117,495 55 2,297 .002480122
A 416,939,394 0.9879 422,046,152 50 1,705 .002749120
A 396,236,143 1.0220 387,706,598 24 1,022 .007854824
F1 30,100,623 0.9798 30,721,191 9 138 .001728929
F1 26,731,739 0.9993 26,750,464 7 45 .007003190
F1 43,132,671 1.0045 42,939,444 9 28 .008551744
F1 25,619,330 0.9560 26,798,462 4 4 .012297548
Random Totals: 1,753,758,146   1,762,009,749 224 8,574  
Catg D1 Exception Values: 5,029,233   3,739,905      
Total Test Values (4): 1,758,787,379   1,765,749,654      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 88,287,483

Confidence Interval Values (5)

State Lower Limit: 1,677,462,171 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,758,787,379 (Within Confidence Interval)
State Upper Limit: 1,854,037,137 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,773,739,708 (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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