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2010 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 96,234,734 0.9637 99,859,639 10 359 .002627344
A 95,939,839 0.9254 103,673,913 9 185 .016830696
A 104,097,628 0.9634 108,052,344 9 131 .011136143
A 92,502,106 1.0047 92,069,380 8 50 .005882977
C 26,181,330 1.0000 26,181,330 10 354 .050561541
C 17,796,457 0.9628 18,484,064 9 118 .003640053
C 14,124,888 1.0138 13,932,618 8 49 .005836483
C 13,731,368 0.9651 14,227,922 7 27 .008408102
D3 57,585,612 1.0354 55,616,778 15 581 .010852360
Random Totals: 518,193,962   532,097,988 85 1,854  
Catg J Exception Values: 4,412,813   4,827,485      
Catg D1 Exception Values: 1,299,420   785,729      
Total Test Values (4): 523,906,195   537,711,202      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 26,885,560

Confidence Interval Values (5)

State Lower Limit: 510,825,642 (State Test Value minus Margin of Error Percent)
Local Test Value: 523,906,195 (Within Confidence Interval)
State Upper Limit: 564,596,762 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 530,054,157 (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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