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2009 Confidence Interval Detail
002/Andrews
002-901/Andrews ISD

Category Summary

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

Stratum
Variance
A 67,467,150 0.9943 67,853,917 16 1,303 .045304705
A 116,803,060 0.9113 128,171,908 31 1,341 .025688637
A 125,367,010 0.9203 136,224,068 23 875 .010643734
A 101,253,530 0.9166 110,466,430 15 370 .012662775
G1 629,542,410 1.0351 608,194,773 8 482 .011256580
G1 648,742,741 0.9934 653,052,890 8 61 .008145551
G1 701,870,989 0.8717 805,174,933 5 15 .102660089
Random Totals: 2,391,046,890   2,509,138,919 106 4,447  
Catg D1 Exception Values: 10,890,981   24,460,031      
Catg G1 Exception Values: 537,154,717   523,864,017      
Total Test Values (4): 2,939,092,588   3,057,462,967      

Margin of Error

Margin of Error Percent: 6.4133567
Margin of Error Value: 196,086,007

Confidence Interval Values (5)

State Lower Limit: 2,861,376,960 (State Test Value minus Margin of Error Percent)
Local Test Value: 2,939,092,588 (Within Confidence Interval)
State Upper Limit: 3,253,548,974 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,189,236,744 (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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