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2006 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 46,755,404 0.8686 53,828,464 16 856 .101625368
A 46,818,167 0.9435 49,621,799 15 552 .055111194
A 46,787,813 1.0026 46,666,480 15 365 .011824405
A 46,605,333 0.9932 46,924,419 15 231 .002418412
D3 26,129,867 0.9796 26,674,017 20 6,596 .001449452
F1 9,893,377 0.9669 10,232,058 7 118 .000491805
F1 9,721,541 0.9533 10,197,777 7 43 .010661206
F1 10,027,652 1.0369 9,670,799 5 13 .012816367
F1 9,433,150 0.9902 9,526,510 2 3 .000004630
L1 4,574,422 1.0410 4,394,257 8 156 .004955158
L1 4,451,747 1.1488 3,875,128 6 34 .020697299
L1 5,048,331 1.0397 4,855,565 5 13 .002142660
L1 3,957,749 1.1913 3,322,210 2 3 .010737217
Random Totals: 270,204,553   279,789,483 123 8,983  
Catg J Exception Values: 17,894,473   19,272,483      
Catg D1 Exception Values: 15,490,049   18,858,224      
Total Test Values (4): 303,589,075   317,920,190      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 15,896,010

Confidence Interval Values (5)

State Lower Limit: 302,024,180 (State Test Value minus Margin of Error Percent)
Local Test Value: 303,589,075 (Within Confidence Interval)
State Upper Limit: 333,816,200 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 289,529,603 (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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