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2009 Confidence Interval Detail
246/Williamson
014-902/Bartlett ISD

Category Summary

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

Stratum
Variance
A 5,408,863 0.9847 5,492,904 8 134 .010163614
A 4,915,400 0.8760 5,611,187 9 75 .019675367
A 5,500,595 0.9491 5,795,591 8 59 .011253034
A 5,944,954 0.9470 6,277,671 7 42 .001573714
D3 5,779,176 1.0221 5,654,218 17 419 .023953267
F1 774,776 0.8522 909,148 6 26 .003059117
F1 774,981 0.9926 780,759 5 13 .006552066
F1 1,143,685 0.9607 1,190,470 5 7 .012082378
Random Totals: 30,242,430   31,711,948 65 775  
Catg J Exception Values: 2,319,186   2,341,549      
Catg D1 Exception Values: 5,746,194   4,410,265      
Catg F1 Exception Values: 509,758   588,003      
Total Test Values (4): 38,817,568   39,051,765      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 1,952,588

Confidence Interval Values (5)

State Lower Limit: 37,099,177 (State Test Value minus Margin of Error Percent)
Local Test Value: 38,817,568 (Within Confidence Interval)
State Upper Limit: 41,004,353 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 37,954,149 (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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