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2009 Confidence Interval Detail
122/Jeff Davis
122-902/Valentine ISD

Category Summary

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

Stratum
Variance
A 1,421,400 1.0000 1,421,400 6 67 .014779264
A 1,173,860 0.9716 1,208,172 5 15 .000073582
A 1,348,350 1.2274 1,098,542 7 10 .001010732
A 1,050,170 1.0631 987,837 3 4 .000114670
C 2,355,940 0.9915 2,376,137 13 1,272 .012504502
C 809,440 0.9933 814,900 13 266 .000002163
C 904,850 0.9933 910,953 12 123 .000030807
D3 9,654,320 0.9845 9,806,318 20 1,576 .000411920
Random Totals: 18,718,330   18,624,259 79 3,333  
Catg J Exception Values: 8,890,278   9,252,108      
Catg D1 Exception Values: 7,224,810   9,031,262      
Catg C Exception Values: 10,200   10,262      
Total Test Values (4): 34,843,618   36,917,891      

Margin of Error

Margin of Error Percent: 5.0000012
Margin of Error Value: 1,845,895

Confidence Interval Values (5)

Local Test Value: 34,843,618 (Outside Confidence Interval)
State Lower Limit: 35,071,996 (State Test Value minus Margin of Error Percent)
State Upper Limit: 38,763,786 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 35,833,415 (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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