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2008 Confidence Interval Detail
226/Tom Green
226-905/Water Valley ISD

Category Summary

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

Stratum
Variance
A 5,872,150 0.9374 6,264,295 17 203 .031135753
A 6,340,450 0.7957 7,968,393 13 117 .023527685
A 7,819,650 0.9422 8,299,353 18 94 .007771055
A 12,752,650 0.9471 13,464,946 19 86 .010204144
D3 8,575,250 0.8400 10,208,631 25 1,180 .095517157
G1 15,490,800 1.0179 15,218,391 10 35 .007030463
G1 15,867,470 1.1916 13,316,104 5 8 .097389492
G1 19,151,509 1.2332 15,529,929 4 5 .057469592
Random Totals: 91,869,929   90,270,042 111 1,728  
Catg J Exception Values: 5,476,914   5,049,611      
Catg D1 Exception Values: 9,344,050   8,644,562      
Catg G1 Exception Values: 9,849,780   11,424,306      
Total Test Values (4): 116,540,673   115,388,521      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 5,769,426

Confidence Interval Values (5)

State Lower Limit: 109,619,095 (State Test Value minus Margin of Error Percent)
Local Test Value: 116,540,673 (Within Confidence Interval)
State Upper Limit: 121,157,947 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 123,582,836 (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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