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2008 Confidence Interval Detail
227/Travis
027-904/Marble Falls ISD

Category Summary

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

Stratum
Variance
A 397,417,751 0.8117 489,611,619 24 975 .103955594
C 69,899,404 1.0849 64,429,352 16 738 .142176648
D3 65,737,322 1.0105 65,054,252 11 658 .005774546
Random Totals: 533,054,477   619,095,223 51 2,371  
Catg D1 Exception Values: 1,424,781   1,005,043      
Total Test Values (4): 534,479,258   620,100,266      

Margin of Error

Margin of Error Percent: 10.5088707
Margin of Error Value: 65,165,535

Confidence Interval Values (5)

Local Test Value: 534,479,258 (Outside Confidence Interval)
State Lower Limit: 554,934,731 (State Test Value minus Margin of Error Percent)
State Upper Limit: 685,265,801 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 514,298,371 (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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