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2006 Confidence Interval Detail
072/Erath
072-903/Stephenville ISD

Category Summary

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

Stratum
Variance
A 104,358,789 0.9514 109,689,709 72 1,888 .018826464
A 104,294,463 0.9444 110,434,628 69 1,109 .014910556
A 104,255,304 0.9591 108,701,182 62 823 .013570304
A 103,890,809 0.9715 106,938,558 36 478 .014410403
D3 176,268,220 0.9293 189,678,489 45 4,486 .041026104
F1 43,420,513 1.0136 42,837,917 8 327 .047503607
F1 43,615,731 0.9204 47,387,800 10 115 .031071790
F1 45,150,727 0.8411 53,680,569 9 44 .091636828
F1 40,337,334 0.8837 45,645,959 5 9 .022014194
L1 20,088,012 0.9005 22,307,620 11 398 .243569939
L1 20,222,074 1.0888 18,572,809 7 96 .002316812
L1 21,499,803 1.1037 19,479,753 8 32 .017262045
L1 17,868,067 1.0152 17,600,539 3 5 .000259492
Random Totals: 845,269,846   892,955,532 345 9,810  
Catg D1 Exception Values: 14,610,930   11,857,477      
Total Test Values (4): 859,880,776   904,813,009      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 45,240,650

Confidence Interval Values (5)

State Lower Limit: 859,572,359 (State Test Value minus Margin of Error Percent)
Local Test Value: 859,880,776 (Within Confidence Interval)
State Upper Limit: 950,053,659 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,004,025,289 (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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