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2009 Confidence Interval Detail
220/Tarrant
220-910/Lake Worth ISD

Category Summary

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

Stratum
Variance
A 83,365,729 1.0152 82,117,542 11 1,285 .011956794
A 79,100,360 0.9686 81,664,629 22 821 .004330979
A 59,250,873 0.9639 61,469,938 11 492 .003880536
A 45,365,002 1.0417 43,549,008 13 286 .007681197
B 23,939,319 0.8734 27,409,342 4 9 .042914530
B 32,374,434 0.8310 38,958,404 5 5 .030436353
F1 63,341,806 0.9947 63,679,306 7 99 .003954893
F1 77,065,205 0.8710 88,478,995 7 35 .035916357
F1 45,047,478 0.8793 51,231,068 4 8 .008739389
L1 17,213,448 1.0567 16,289,815 7 139 .012325305
L1 20,005,612 1.0326 19,374,019 6 33 .000999855
L1 18,022,112 1.0504 17,157,380 4 10 .001732551
Random Totals: 564,091,378   591,379,446 101 3,222  
Catg D1 Exception Values: 36,203   35,529      
Catg B Exception Values: 9,507,217   8,411,000      
Catg F1 Exception Values: 57,070,348   62,699,325      
Catg L1 Exception Values: 13,279,737   12,210,293      
Total Test Values (4): 643,984,883   674,735,593      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 33,736,780

Confidence Interval Values (5)

State Lower Limit: 640,998,813 (State Test Value minus Margin of Error Percent)
Local Test Value: 643,984,883 (Within Confidence Interval)
State Upper Limit: 708,472,373 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 716,140,700 (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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