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2009 Confidence Interval Detail
218/Sutton
218-901/Sonora ISD

Category Summary

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

Stratum
Variance
A 19,976,910 0.7557 26,434,974 9 505 .120790777
A 19,831,740 0.8907 22,265,342 9 258 .038412683
A 19,787,000 0.9432 20,978,584 10 171 .011732603
A 22,808,550 0.8606 26,503,079 10 113 .007105803
G1 222,632,674 0.9396 236,944,097 7 1,969 .004979068
G1 222,524,026 1.0951 203,199,732 7 753 .038757105
G1 222,322,577 1.1617 191,376,928 7 422 .011844664
G1 222,335,796 1.1333 196,184,414 7 206 .013552383
Random Totals: 972,219,273   923,887,150 66 4,397  
Catg D1 Exception Values: 44,771,028   42,203,440      
Total Test Values (4): 1,016,990,301   966,090,590      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 48,304,530

Confidence Interval Values (5)

State Lower Limit: 917,786,060 (State Test Value minus Margin of Error Percent)
State Upper Limit: 1,014,395,120 (State Test Value plus Margin of Error Percent)
Local Test Value: 1,016,990,301 (Outside Confidence Interval)
Value Assigned (6): 1,346,864,898 (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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