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2008 Confidence Interval Detail
146/Liberty
146-907/Tarkington ISD

Category Summary

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

Stratum
Variance
A 47,415,470 1.0956 43,278,085 8 1,111 .184041386
A 47,345,113 0.8504 55,673,933 7 581 .021499617
A 47,386,389 0.9183 51,602,297 16 413 .036303824
A 47,372,214 0.9803 48,324,201 12 263 .025860761
D3 69,945,584 0.9693 72,160,924 25 3,553 .064282806
Random Totals: 259,464,770   271,039,440 68 5,921  
Catg J Exception Values: 12,517,912   12,517,628      
Catg D1 Exception Values: 18,652,303   17,419,591      
Total Test Values (4): 290,634,985   300,977,172      

Margin of Error

Margin of Error Percent: 5.7818468
Margin of Error Value: 17,402,039

Confidence Interval Values (5)

State Lower Limit: 283,575,133 (State Test Value minus Margin of Error Percent)
Local Test Value: 290,634,985 (Within Confidence Interval)
State Upper Limit: 318,379,211 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 336,941,226 (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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