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2008 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 7,491,350 0.9356 8,007,001 9 86 .041487580
A 8,588,510 1.0233 8,392,954 8 44 .004936985
A 8,194,280 1.0351 7,916,414 6 33 .003804053
A 6,865,020 1.0655 6,443,003 6 20 .006580178
C 8,090,800 1.0110 8,002,770 9 324 .007154541
C 8,083,000 0.9736 8,302,177 9 259 .027894619
C 9,624,190 1.0905 8,825,484 9 199 .036801140
C 5,546,000 0.9739 5,694,630 8 75 .005669424
D3 26,881,900 1.0639 25,267,318 37 739 .024022042
Random Totals: 89,365,050   86,851,751 101 1,779  
Catg J Exception Values: 2,883,168   2,773,969      
Catg D1 Exception Values: 4,087,830   2,775,663      
Total Test Values (4): 96,336,048   92,401,383      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 4,620,069

Confidence Interval Values (5)

State Lower Limit: 87,781,314 (State Test Value minus Margin of Error Percent)
Local Test Value: 96,336,048 (Within Confidence Interval)
State Upper Limit: 97,021,452 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 118,365,511 (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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