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2007 Confidence Interval Detail
250/Wood
250-907/Winnsboro ISD

Category Summary

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

Stratum
Variance
A 38,405,696 0.9325 41,185,733 21 987 .059302802
A 38,357,720 0.8739 43,892,574 22 535 .057678759
A 38,383,908 0.9523 40,306,529 13 369 .009855489
A 38,328,265 0.9764 39,254,675 18 213 .014474590
D3 116,628,501 0.8555 136,327,880 22 2,471 .029797842
F1 9,486,027 1.0157 9,339,398 7 149 .090545623
F1 9,552,376 0.8044 11,875,157 8 53 .061542579
F1 10,038,967 0.7294 13,763,322 5 24 .070782513
F1 8,816,153 0.7593 11,610,896 4 8 .049860281
G1 4,810,260 1.0375 4,636,395 4 9 .004593137
G1 5,238,829 1.0989 4,767,339 3 5 .054549711
G1 5,725,080 1.2355 4,633,816 2 3 .031849468
Random Totals: 323,771,782   361,593,714 129 4,826  
Catg D1 Exception Values: 13,581,808   9,181,089      
Catg G1 Exception Values: 19,660,890   19,504,948      
Total Test Values (4): 357,014,480   390,279,751      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 19,513,988

Confidence Interval Values (5)

Local Test Value: 357,014,480 (Outside Confidence Interval)
State Lower Limit: 370,765,763 (State Test Value minus Margin of Error Percent)
State Upper Limit: 409,793,739 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 386,612,238 (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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