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2011 Confidence Interval Detail
234/Van Zandt
234-907/Wills Point ISD

Category Summary

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

Stratum
Variance
A 46,621,250 0.6901 67,557,238 9 987 .654881105
A 48,554,570 1.1836 41,022,786 8 621 .042479330
A 48,699,510 0.9752 49,937,972 7 423 .036084881
A 47,992,770 1.1645 41,213,199 7 262 .003835112
D3 145,257,490 1.0809 134,385,688 21 4,569 .037681599
F1 9,502,340 0.9044 10,506,789 10 118 .036261417
F1 10,449,000 0.9160 11,407,205 8 46 .022559182
F1 11,272,310 0.8981 12,551,286 7 22 .031384265
F1 8,315,130 0.9078 9,159,650 3 4 .013364599
Random Totals: 376,664,370   377,741,813 80 7,052  
Catg D1 Exception Values: 9,000,530   5,126,092      
Total Test Values (4): 385,664,900   382,867,905      

Margin of Error

Margin of Error Percent: 10.1974797
Margin of Error Value: 39,042,877

Confidence Interval Values (5)

State Lower Limit: 343,825,028 (State Test Value minus Margin of Error Percent)
Local Test Value: 385,664,900 (Within Confidence Interval)
State Upper Limit: 421,910,782 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 389,290,298 (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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