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2009 Confidence Interval Detail
174/Nacogdoches
174-911/Douglass ISD

Category Summary

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

Stratum
Variance
A 10,133,330 0.9477 10,692,550 8 148 .013303120
A 9,852,170 0.9837 10,015,421 6 70 .003379064
A 14,114,600 0.9443 14,947,157 6 66 .004567689
A 13,708,750 0.9561 14,338,197 8 42 .002132085
D3 32,217,820 1.0420 30,919,213 21 1,271 .024037210
G1 20,886,440 0.9940 21,012,515 7 82 .011490374
G1 21,479,490 0.9138 23,505,680 6 39 .059390165
G1 21,265,099 1.0144 20,963,229 5 22 .001111696
G1 19,851,830 1.0219 19,426,392 4 12 .004589207
Random Totals: 163,509,529   165,820,354 71 1,752  
Catg J Exception Values: 2,860,590   2,805,508      
Catg D1 Exception Values: 9,992,020   6,263,418      
Total Test Values (4): 176,362,139   174,889,280      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 8,744,464

Confidence Interval Values (5)

State Lower Limit: 166,144,816 (State Test Value minus Margin of Error Percent)
Local Test Value: 176,362,139 (Within Confidence Interval)
State Upper Limit: 183,633,744 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 206,876,762 (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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