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2009 Confidence Interval Detail
072/Erath
072-904/Bluff Dale ISD

Category Summary

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

Stratum
Variance
A 8,645,560 0.9739 8,877,256 6 95 .003545250
A 7,407,670 1.0002 7,406,189 6 38 .006154056
A 8,244,970 1.0288 8,014,162 6 34 .001033114
A 8,227,220 1.0894 7,552,065 6 25 .035655531
C 8,109,280 0.9331 8,690,687 10 352 .024982924
C 8,350,860 1.0779 7,747,342 8 275 .035287159
C 11,521,390 1.0144 11,357,837 10 248 .005295202
C 3,355,000 1.0033 3,343,965 7 44 .008043914
D3 29,767,770 0.9616 30,956,500 26 739 .028478051
Random Totals: 93,629,720   93,946,003 85 1,850  
Catg J Exception Values: 2,378,317   2,453,093      
Catg D1 Exception Values: 3,541,200   3,079,137      
Total Test Values (4): 99,549,237   99,478,233      

Margin of Error

Margin of Error Percent: 5.0000004
Margin of Error Value: 4,973,912

Confidence Interval Values (5)

State Lower Limit: 94,504,321 (State Test Value minus Margin of Error Percent)
Local Test Value: 99,549,237 (Within Confidence Interval)
State Upper Limit: 104,452,145 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 129,443,620 (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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