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2008 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 364,181,945 0.9953 365,901,683 57 3,064 .002471439
A 384,210,790 1.0113 379,917,720 56 2,278 .003698055
A 411,667,359 1.0035 410,231,549 68 1,771 .004301449
A 462,894,534 0.9841 470,373,472 56 1,233 .003916343
D3 104,483,271 0.9633 108,463,896 19 2,380 .011078707
F1 28,771,123 0.8729 32,960,388 7 139 .047141346
F1 34,103,658 0.9609 35,491,371 6 54 .015721059
F1 31,239,141 1.0349 30,185,661 7 19 .025330914
Random Totals: 1,821,551,821   1,833,525,740 276 10,938  
Catg D1 Exception Values: 4,807,145   3,564,126      
Catg F1 Exception Values: 26,096,400   29,348,213      
Total Test Values (4): 1,852,455,366   1,866,438,079      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 93,321,904

Confidence Interval Values (5)

State Lower Limit: 1,773,116,175 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,852,455,366 (Within Confidence Interval)
State Upper Limit: 1,959,759,983 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,527,146,032 (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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