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2009 Confidence Interval Detail
071/El Paso
071-909/Socorro ISD

Category Summary

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

Stratum
Variance
A 1,355,509,991 1.0634 1,274,694,368 90 14,552 .013488021
A 1,323,834,741 1.0441 1,267,919,491 95 11,054 .014382136
A 1,246,431,744 1.0491 1,188,096,220 96 8,018 .023762317
A 1,218,979,942 1.0871 1,121,313,533 95 4,762 .032368637
F1 253,828,596 0.9566 265,344,549 13 462 .066156762
F1 219,704,602 0.9325 235,608,152 9 122 .103170596
F1 230,224,244 0.7488 307,457,591 6 58 .044245892
F1 238,466,687 0.9504 250,911,918 7 17 .026523608
L1 188,689,975 1.0359 182,150,763 7 471 .003345078
L1 210,633,730 0.9848 213,884,779 8 42 .001243742
L1 252,934,009 0.9977 253,517,098 4 13 .000044655
Random Totals: 6,739,238,261   6,560,898,462 430 39,571  
Catg D1 Exception Values: 2,750,090   2,603,497      
Catg L1 Exception Values: 143,937,643   142,840,640      
Total Test Values (4): 6,885,925,994   6,706,342,599      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 335,317,130

Confidence Interval Values (5)

State Lower Limit: 6,371,025,469 (State Test Value minus Margin of Error Percent)
Local Test Value: 6,885,925,994 (Within Confidence Interval)
State Upper Limit: 7,041,659,729 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 6,937,903,007 (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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