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2008 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 40,711,408 0.9949 40,920,101 15 759 .012260625
A 56,745,171 0.9528 59,556,225 16 643 .012104845
A 55,450,004 0.9698 57,176,742 15 416 .000429967
A 71,644,843 0.9471 75,646,545 16 331 .002705608
D3 34,540,598 0.9700 35,608,864 10 6,659 .000084754
F1 10,582,057 0.8194 12,914,397 9 121 .161767789
F1 12,971,429 0.9634 13,464,219 6 51 .000493681
F1 11,415,699 1.0315 11,067,086 5 14 .022322013
F1 13,260,075 0.9299 14,259,678 2 4 .001149961
Random Totals: 307,321,284   320,613,857 94 8,998  
Catg J Exception Values: 18,182,457   17,638,093      
Catg D1 Exception Values: 16,975,755   20,578,612      
Total Test Values (4): 342,479,496   358,830,562      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 17,941,528

Confidence Interval Values (5)

State Lower Limit: 340,889,034 (State Test Value minus Margin of Error Percent)
Local Test Value: 342,479,496 (Within Confidence Interval)
State Upper Limit: 376,772,090 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 341,984,931 (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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