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2007 Confidence Interval Detail
246/Williamson
246-902/Florence ISD

Category Summary

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

Stratum
Variance
A 25,522,553 1.0816 23,597,035 7 391 .045729659
A 25,536,766 0.9760 26,164,719 9 252 .049413488
A 25,573,100 0.9815 26,055,120 8 176 .002262757
A 25,345,553 0.9796 25,873,370 8 106 .021545982
D3 81,679,341 0.9708 84,136,116 30 1,986 .055086802
Random Totals: 183,657,313   185,826,360 62 2,911  
Catg D1 Exception Values: 4,521,078   3,863,741      
Total Test Values (4): 188,178,391   189,690,101      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 9,484,505

Confidence Interval Values (5)

State Lower Limit: 180,205,596 (State Test Value minus Margin of Error Percent)
Local Test Value: 188,178,391 (Within Confidence Interval)
State Upper Limit: 199,174,606 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 215,973,767 (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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