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2010 Confidence Interval Detail
246/Williamson
246-904/Georgetown ISD

Category Summary

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

Stratum
Variance
A 1,000,213,780 0.9539 1,048,552,029 60 6,863 .003130645
A 926,231,407 0.9721 952,814,944 59 4,594 .005375649
A 944,145,567 0.9557 987,909,979 61 3,414 .006340780
A 866,713,588 0.9674 895,920,600 60 1,938 .008035579
F1 207,546,030 0.9409 220,582,453 13 478 .015361132
F1 217,462,230 0.9939 218,796,891 9 133 .001306895
F1 179,027,993 0.9802 182,644,351 8 31 .000301471
F1 203,012,329 1.0088 201,241,405 3 5 .000019772
Random Totals: 4,544,352,924   4,708,462,652 273 17,456  
Catg J Exception Values: 33,914,320   30,826,226      
Catg D1 Exception Values: 11,863,494   10,178,618      
Total Test Values (4): 4,590,130,738   4,749,467,496      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 237,473,375

Confidence Interval Values (5)

State Lower Limit: 4,511,994,121 (State Test Value minus Margin of Error Percent)
Local Test Value: 4,590,130,738 (Within Confidence Interval)
State Upper Limit: 4,986,940,871 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 5,302,577,646 (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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