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2010 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 23,378,700 0.8904 26,256,402 11 366 .011415252
A 27,771,787 0.9631 28,835,829 10 247 .020415963
A 25,920,183 0.9444 27,446,191 9 140 .003797919
A 24,329,435 0.9614 25,306,257 9 83 .003485648
D3 72,960,751 1.0433 69,932,667 17 1,802 .125982525
F1 3,479,544 0.9885 3,520,024 8 40 .001336842
F1 2,873,357 0.9873 2,910,318 6 17 .000756499
F1 3,539,068 1.0043 3,523,915 5 12 .000883631
F1 3,400,911 1.0055 3,382,308 3 5 .000053817
Random Totals: 187,653,736   191,113,911 78 2,712  
Catg J Exception Values: 6,885,329   6,518,141      
Catg D1 Exception Values: 4,471,082   3,796,356      
Total Test Values (4): 199,010,147   201,428,408      

Margin of Error

Margin of Error Percent: 6.1652803
Margin of Error Value: 12,418,626

Confidence Interval Values (5)

State Lower Limit: 189,009,782 (State Test Value minus Margin of Error Percent)
Local Test Value: 199,010,147 (Within Confidence Interval)
State Upper Limit: 213,847,034 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 229,730,797 (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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