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2011 Confidence Interval Detail
022/Brewster
022-901/Alpine ISD

Category Summary

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

Stratum
Variance
A 62,151,942 0.9628 64,553,326 13 1,002 .021521129
A 58,564,485 0.8456 69,257,906 11 542 .016053373
A 62,467,632 0.9905 63,066,766 14 395 .007590373
A 72,105,157 1.0877 66,291,401 12 298 .037570595
D3 37,806,886 1.0445 36,196,157 34 6,685 .057086012
F1 13,760,589 1.0473 13,139,109 9 125 .027289356
F1 13,446,872 0.9204 14,609,813 9 45 .121521364
F1 13,904,498 0.7693 18,074,221 6 14 .035951804
F1 13,173,936 0.7960 16,550,171 3 4 .031444326
L1 5,324,511 1.0129 5,256,700 11 123 .013917203
L1 4,914,637 1.0458 4,699,404 8 20 .014134053
L1 5,983,696 1.0810 5,535,334 4 9 .004555499
L1 6,173,807 1.2131 5,089,281 2 4 .029300715
Random Totals: 369,778,648   382,319,589 136 9,266  
Catg J Exception Values: 21,384,857   21,501,664      
Catg D1 Exception Values: 18,186,919   23,442,887      
Total Test Values (4): 409,350,424   427,264,140      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 21,363,207

Confidence Interval Values (5)

State Lower Limit: 405,900,933 (State Test Value minus Margin of Error Percent)
Local Test Value: 409,350,424 (Within Confidence Interval)
State Upper Limit: 448,627,347 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 393,965,116 (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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