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2007 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 49,690,964 0.8860 56,084,609 11 872 .045681360
A 49,701,947 0.8009 62,057,619 17 555 .130307055
A 49,732,199 0.8929 55,697,389 11 369 .020500027
A 49,498,701 0.9585 51,641,837 12 233 .004338381
D3 32,274,569 0.9742 33,129,305 10 6,637 .000222225
F1 10,727,375 0.9598 11,176,677 8 120 .000183979
F1 10,873,459 0.9304 11,686,865 7 45 .008177358
F1 10,812,229 0.9685 11,163,892 7 13 .001764816
F1 10,007,421 0.8658 11,558,583 2 3 .039705415
L1 4,978,996 1.0126 4,917,041 8 164 .009705577
L1 4,946,722 1.0324 4,791,478 6 34 .001192292
L1 5,051,049 1.1063 4,565,714 6 13 .014100976
L1 4,841,624 1.2023 4,026,968 3 4 .011150134
Random Totals: 293,137,255   322,497,977 108 9,062  
Catg J Exception Values: 17,454,071   17,433,763      
Catg D1 Exception Values: 15,559,740   19,374,847      
Total Test Values (4): 326,151,066   359,306,587      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 17,965,329

Confidence Interval Values (5)

Local Test Value: 326,151,066 (Outside Confidence Interval)
State Lower Limit: 341,341,258 (State Test Value minus Margin of Error Percent)
State Upper Limit: 377,271,916 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 343,987,115 (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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