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2011 Confidence Interval Detail
187/Polk
187-901/Big Sandy ISD

Category Summary

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

Stratum
Variance
A 7,888,191 1.1828 6,669,083 10 284 .114503474
A 7,904,182 0.9596 8,236,955 10 140 .010407996
A 7,887,098 0.9408 8,383,395 10 88 .012966504
A 7,635,843 0.9336 8,178,924 10 51 .010894926
D3 18,779,496 0.9398 19,982,439 15 1,278 .025940927
G1 43,941,115 0.9745 45,090,934 7 25 .033677442
G1 45,132,660 0.9873 45,713,218 6 13 .034330504
G1 42,308,170 1.0274 41,179,842 3 5 .001130407
Random Totals: 181,476,755   183,434,790 71 1,884  
Catg J Exception Values: 9,881,910   8,531,439      
Catg D1 Exception Values: 16,995,689   15,746,783      
Catg G1 Exception Values: 43,629,250   43,482,686      
Total Test Values (4): 251,983,604   251,195,698      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 12,559,785

Confidence Interval Values (5)

State Lower Limit: 238,635,913 (State Test Value minus Margin of Error Percent)
Local Test Value: 251,983,604 (Within Confidence Interval)
State Upper Limit: 263,755,483 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 251,478,446 (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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