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2008 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 17,546,290 0.8230 21,319,915 13 334 .051140957
A 19,356,280 0.9091 21,291,695 13 195 .010555526
A 23,707,910 0.9597 24,703,459 13 159 .012794894
A 26,397,120 0.9708 27,191,100 16 95 .000253204
C 3,213,400 0.6422 5,003,737 9 339 .219893792
C 3,427,280 0.7293 4,699,410 13 197 .263442679
C 4,304,280 0.8907 4,832,469 7 114 .070449395
C 5,305,400 0.8278 6,409,036 7 57 .015551902
D3 23,678,270 0.9684 24,450,919 18 2,393 .000209895
F1 3,174,170 0.9843 3,224,799 6 34 .001193017
F1 3,419,480 0.9736 3,512,202 5 19 .000294836
F1 4,721,820 0.9757 4,839,418 4 13 .000006655
F1 2,995,630 0.9890 3,028,948 3 4 .000039066
Random Totals: 141,247,330   154,507,107 127 3,953  
Catg J Exception Values: 7,788,360   7,393,261      
Catg D1 Exception Values: 13,363,020   15,303,864      
Total Test Values (4): 162,398,710   177,204,232      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 8,860,212

Confidence Interval Values (5)

Local Test Value: 162,398,710 (Outside Confidence Interval)
State Lower Limit: 168,344,020 (State Test Value minus Margin of Error Percent)
State Upper Limit: 186,064,444 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 178,650,448 (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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