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2009 Confidence Interval Detail
071/El Paso
071-904/San Elizario ISD

Category Summary

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

Stratum
Variance
A 26,483,667 0.9374 28,252,258 17 1,259 .053447860
A 27,683,959 0.8663 31,956,550 15 656 .107875808
A 29,999,890 0.9630 31,152,534 15 404 .068090692
A 33,166,710 1.0255 32,341,989 16 295 .005177792
C 1,960,012 0.9515 2,059,918 11 148 .011457854
C 2,020,274 0.9891 2,042,538 10 126 .000882554
C 1,892,054 1.0024 1,887,524 9 108 .004286795
C 2,509,977 1.0467 2,397,991 10 76 .020129076
F1 2,181,669 1.0375 2,102,813 8 26 .008118454
F1 2,575,888 1.0553 2,440,906 5 15 .016033226
Random Totals: 130,474,100   136,635,021 116 3,113  
Catg D1 Exception Values: 3,115,860   2,934,469      
Catg F1 Exception Values: 3,957,842   4,480,177      
Total Test Values (4): 137,547,802   144,049,667      

Margin of Error

Margin of Error Percent: 5.1879641
Margin of Error Value: 7,473,245

Confidence Interval Values (5)

State Lower Limit: 136,576,422 (State Test Value minus Margin of Error Percent)
Local Test Value: 137,547,802 (Within Confidence Interval)
State Upper Limit: 151,522,912 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 141,705,076 (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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