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2008 Confidence Interval Detail
198/Robertson
198-902/Calvert ISD

Category Summary

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

Stratum
Variance
A 4,317,960 0.4981 8,668,862 18 219 .130972221
A 4,361,580 0.6353 6,865,386 17 111 .061589332
A 4,430,670 1.0146 4,366,913 21 66 .163780545
A 4,324,580 1.2024 3,596,623 19 34 .036357381
D3 10,930,910 0.6636 16,472,137 20 1,001 .287079506
F1 721,120 0.5357 1,346,127 9 44 .347452575
F1 746,910 0.4575 1,632,590 8 14 .861490857
F1 542,060 0.6572 824,802 4 5 .138018699
Random Totals: 30,375,790   43,773,440 116 1,494  
Catg J Exception Values: 10,795,358   10,830,582      
Catg D1 Exception Values: 6,042,490   6,851,297      
Catg F1 Exception Values: 867,340   1,153,752      
Total Test Values (4): 48,080,978   62,609,071      

Margin of Error

Margin of Error Percent: 6.8987032
Margin of Error Value: 4,319,214

Confidence Interval Values (5)

Local Test Value: 48,080,978 (Outside Confidence Interval)
State Lower Limit: 58,289,857 (State Test Value minus Margin of Error Percent)
State Upper Limit: 66,928,285 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 75,569,957 (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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