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2009 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 2,470,910 1.0481 2,357,514 7 61 .011015340
A 2,804,250 0.9941 2,820,893 6 41 .002950432
A 2,765,060 0.9326 2,964,894 7 29 .023551197
A 4,493,820 1.0018 4,485,746 5 29 .011190526
D3 25,697,090 1.1716 21,933,330 20 1,045 .042012749
G1 34,401,269 1.0010 34,366,902 17 50 .020994973
Random Totals: 72,632,399   68,929,279 62 1,255  
Catg J Exception Values: 966,260   928,457      
Catg D1 Exception Values: 6,956,610   4,544,907      
Total Test Values (4): 80,555,269   74,402,643      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 3,720,132

Confidence Interval Values (5)

State Lower Limit: 70,682,511 (State Test Value minus Margin of Error Percent)
State Upper Limit: 78,122,775 (State Test Value plus Margin of Error Percent)
Local Test Value: 80,555,269 (Outside Confidence Interval)
Value Assigned (6): 101,837,467 (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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