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2009 Confidence Interval Detail
122/Jeff Davis
122-901/Fort Davis ISD

Category Summary

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

Stratum
Variance
A 21,488,660 0.9219 23,309,101 9 373 .115930088
A 24,195,550 0.8391 28,835,121 7 218 .058941784
A 22,321,320 1.0911 20,457,630 8 134 .032173437
A 21,886,240 1.0817 20,233,188 6 71 .006033447
C 4,530,460 0.8798 5,149,420 8 373 .099479927
C 5,436,040 0.6457 8,418,832 8 213 .180616916
C 3,188,230 0.9573 3,330,440 7 65 .009576152
C 3,895,310 0.9955 3,912,918 6 33 .000002262
D3 25,059,410 0.9953 25,177,745 11 2,474 .000005699
F1 2,987,200 0.9944 3,004,023 6 32 .000090566
F1 4,451,830 0.9906 4,494,074 5 22 .000291571
F1 3,038,730 0.9821 3,094,115 4 8 .000970738
F1 4,154,600 0.9865 4,211,455 3 6 .000192212
Random Totals: 146,633,580   153,628,062 88 4,022  
Catg D1 Exception Values: 13,372,760   16,639,067      
Total Test Values (4): 160,006,340   170,267,129      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 8,513,356

Confidence Interval Values (5)

Local Test Value: 160,006,340 (Outside Confidence Interval)
State Lower Limit: 161,753,773 (State Test Value minus Margin of Error Percent)
State Upper Limit: 178,780,485 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 175,028,326 (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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