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2009 Confidence Interval Detail
246/Williamson
246-907/Jarrell ISD

Category Summary

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

Stratum
Variance
A 151,216,985 0.9956 151,885,280 71 1,200 .003553955
A 137,816,878 0.9803 140,586,431 37 750 .003294948
A 109,981,338 1.0207 107,750,894 14 466 .003981100
A 114,618,279 0.9800 116,957,428 15 334 .004645144
D3 80,916,881 1.0847 74,598,397 12 1,629 .051986289
Random Totals: 594,550,361   591,778,430 149 4,379  
Catg D1 Exception Values: 4,843,841   3,657,346      
Total Test Values (4): 599,394,202   595,435,776      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 29,771,789

Confidence Interval Values (5)

State Lower Limit: 565,663,987 (State Test Value minus Margin of Error Percent)
Local Test Value: 599,394,202 (Within Confidence Interval)
State Upper Limit: 625,207,565 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 622,483,531 (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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