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2009 Confidence Interval Detail
071/El Paso
071-908/Tornillo ISD

Category Summary

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

Stratum
Variance
A 5,839,527 1.0343 5,645,874 15 369 .032220123
A 7,393,719 0.9492 7,789,422 13 230 .073171424
A 6,836,086 0.9529 7,173,980 16 122 .024319231
A 6,508,055 0.9759 6,668,772 15 70 .012430118
D3 5,150,937 1.0160 5,069,820 12 931 .003133248
F1 3,929,236 1.0944 3,590,311 14 30 .040892929
Random Totals: 35,657,560   35,938,179 85 1,752  
Catg J Exception Values: 3,334,870   3,492,838      
Catg D1 Exception Values: 7,020,996   6,839,114      
Catg F1 Exception Values: 1,088,015   1,094,055      
Total Test Values (4): 47,101,441   47,364,186      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 2,368,209

Confidence Interval Values (5)

State Lower Limit: 44,995,977 (State Test Value minus Margin of Error Percent)
Local Test Value: 47,101,441 (Within Confidence Interval)
State Upper Limit: 49,732,395 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 51,575,110 (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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