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2008 Confidence Interval Detail
174/Nacogdoches
174-909/Martinsville ISD

Category Summary

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

Stratum
Variance
A 2,703,570 0.9351 2,891,209 6 65 .003039581
A 2,520,440 0.8384 3,006,250 7 36 .009305746
A 2,570,760 0.8474 3,033,703 6 26 .010508368
A 2,569,360 0.8986 2,859,292 5 15 .004087760
D3 23,664,640 0.9077 26,070,993 19 1,042 .036788245
G1 24,056,171 1.0174 23,644,752 18 43 .009825948
Random Totals: 58,084,941   61,506,199 61 1,227  
Catg J Exception Values: 983,067   978,729      
Catg D1 Exception Values: 6,954,150   7,392,587      
Total Test Values (4): 66,022,158   69,877,515      

Margin of Error

Margin of Error Percent: 5.0000004
Margin of Error Value: 3,493,876

Confidence Interval Values (5)

Local Test Value: 66,022,158 (Outside Confidence Interval)
State Lower Limit: 66,383,639 (State Test Value minus Margin of Error Percent)
State Upper Limit: 73,371,391 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 77,433,439 (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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