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2009 Confidence Interval Detail
227/Travis
227-913/Lake Travis ISD

Category Summary

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

Stratum
Variance
A 1,385,838,924 0.9910 1,398,424,747 74 5,459 .008496519
A 1,445,998,473 0.9926 1,456,778,635 74 3,535 .007360596
A 1,458,795,955 0.9975 1,462,452,085 73 2,288 .011049154
A 1,450,664,905 0.9682 1,498,311,201 35 1,035 .010445507
C 82,590,363 0.9539 86,581,783 23 1,880 .073583333
C 77,473,130 0.9957 77,807,703 16 670 .006310129
C 102,124,015 0.9120 111,978,087 16 435 .017305763
C 82,428,765 1.0474 78,698,458 8 112 .036278964
F1 200,482,077 1.0265 195,306,456 7 275 .013031299
F1 191,176,261 0.9633 198,459,733 6 65 .036249819
F1 138,740,370 1.0109 137,244,406 5 18 .000317816
F1 165,925,927 1.0067 164,821,622 2 4 .000801034
Random Totals: 6,782,239,165   6,866,864,916 339 15,776  
Catg D1 Exception Values: 1,748,251   1,093,391      
Catg D3 Exception Values: 1,500,000   1,500,000      
Total Test Values (4): 6,785,487,416   6,869,458,307      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 343,472,915

Confidence Interval Values (5)

State Lower Limit: 6,525,985,392 (State Test Value minus Margin of Error Percent)
Local Test Value: 6,785,487,416 (Within Confidence Interval)
State Upper Limit: 7,212,931,222 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,055,548,113 (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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