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2009 Confidence Interval Detail
227/Travis
227-907/Manor ISD

Category Summary

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

Stratum
Variance
A 252,713,969 1.0168 248,538,522 27 2,424 .021905924
A 272,819,858 0.9807 278,188,904 50 1,930 .011343294
A 275,008,795 1.0336 266,068,881 44 1,595 .007756047
A 307,486,107 1.0136 303,360,405 33 1,315 .013813642
B 21,061,674 1.0098 20,857,273 5 21 .008982615
D3 106,186,434 0.8095 131,175,335 10 1,735 .058489166
F1 125,166,683 1.0406 120,283,186 7 156 .010073632
F1 142,722,326 1.0085 141,519,411 6 52 .005990509
F1 133,079,733 0.9828 135,408,764 6 24 .014231384
F1 100,544,799 0.9553 105,249,449 4 8 .003389512
L1 89,266,360 0.9134 97,729,757 10 312 .006599870
L1 87,091,910 0.9046 96,276,708 6 59 .008067432
L1 74,250,195 1.0415 71,291,594 5 12 .052445204
Random Totals: 1,987,398,843   2,015,948,189 213 9,643  
Catg D1 Exception Values: 4,250,810   3,488,888      
Catg B Exception Values: 108,737,774   110,700,200      
Catg L1 Exception Values: 49,661,382   49,693,827      
Total Test Values (4): 2,150,048,809   2,179,831,104      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 108,991,555

Confidence Interval Values (5)

State Lower Limit: 2,070,839,549 (State Test Value minus Margin of Error Percent)
Local Test Value: 2,150,048,809 (Within Confidence Interval)
State Upper Limit: 2,288,822,659 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,886,870,897 (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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