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2007 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 2,659,854 0.9821 2,708,333 12 65 .033222345
A 2,711,927 0.9342 2,902,940 15 39 .004135469
A 2,667,896 0.8877 3,005,403 11 27 .009893149
A 2,596,385 0.8699 2,984,694 8 15 .002106932
D3 22,304,470 0.9620 23,185,520 20 1,038 .007117625
Random Totals: 32,940,532   34,786,890 66 1,184  
Catg D1 Exception Values: 6,921,634   7,023,706      
Total Test Values (4): 39,862,166   41,810,596      

Margin of Error

Margin of Error Percent: 5.0000005
Margin of Error Value: 2,090,530

Confidence Interval Values (5)

State Lower Limit: 39,720,066 (State Test Value minus Margin of Error Percent)
Local Test Value: 39,862,166 (Within Confidence Interval)
State Upper Limit: 43,901,126 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 50,717,776 (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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