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2007 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 115,170,968 1.0010 115,055,912 26 794 .003860451
A 115,087,860 0.9908 116,156,500 24 586 .004030185
A 115,116,782 0.9984 115,301,264 25 458 .005474366
A 114,966,043 0.9822 117,049,525 24 325 .005962913
D3 68,637,094 0.9908 69,274,419 17 1,614 .002487366
Random Totals: 528,978,747   532,837,620 116 3,777  
Catg D1 Exception Values: 4,511,332   4,222,220      
Total Test Values (4): 533,490,079   537,059,840      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 26,852,992

Confidence Interval Values (5)

State Lower Limit: 510,206,848 (State Test Value minus Margin of Error Percent)
Local Test Value: 533,490,079 (Within Confidence Interval)
State Upper Limit: 563,912,832 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 527,274,139 (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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