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2008 Confidence Interval Detail
174/Nacogdoches
174-903/Garrison ISD

Category Summary

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

Stratum
Variance
A 6,481,940 0.8085 8,017,242 8 190 .026019419
A 7,315,760 0.8132 8,996,262 9 119 .012812093
A 7,537,320 0.8074 9,335,298 8 82 .014413786
A 8,298,690 0.8933 9,289,925 6 52 .012141154
D3 27,980,060 0.6779 41,274,613 16 1,566 1.075788105
G1 39,782,232 1.0067 39,517,465 12 128 .003730886
G1 40,214,809 1.0145 39,640,029 7 50 .001944495
G1 39,623,711 0.9769 40,560,662 6 27 .002810609
G1 38,264,349 1.0417 36,732,600 5 15 .003515181
Random Totals: 215,498,871   233,364,096 77 2,229  
Catg J Exception Values: 7,599,903   8,734,054      
Catg D1 Exception Values: 9,911,850   10,129,472      
Total Test Values (4): 233,010,624   252,227,622      

Margin of Error

Margin of Error Percent: 8.5194567
Margin of Error Value: 21,488,423

Confidence Interval Values (5)

State Lower Limit: 230,739,199 (State Test Value minus Margin of Error Percent)
Local Test Value: 233,010,624 (Within Confidence Interval)
State Upper Limit: 273,716,045 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 281,093,853 (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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