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2010 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 419,665,339 0.9975 420,717,132 54 3,446 .004420136
A 405,750,829 0.9913 409,311,842 53 2,296 .003564687
A 417,005,848 0.9776 426,560,810 51 1,714 .003004923
A 390,382,626 1.0113 386,020,593 29 1,034 .001593632
F1 32,280,235 0.9691 33,309,499 10 143 .004986828
F1 34,561,742 0.9947 34,745,895 9 51 .002147154
F1 27,774,393 0.9768 28,434,063 8 18 .006814961
F1 30,398,600 0.9854 30,848,995 5 6 .008873868
Random Totals: 1,757,819,612   1,769,948,829 219 8,708  
Catg J Exception Values: 56,912,450   59,836,618      
Catg D1 Exception Values: 5,180,556   3,825,757      
Total Test Values (4): 1,819,912,618   1,833,611,204      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 91,680,560

Confidence Interval Values (5)

State Lower Limit: 1,741,930,644 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,819,912,618 (Within Confidence Interval)
State Upper Limit: 1,925,291,764 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,729,448,277 (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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