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2006 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 6,704,206 0.9707 6,906,568 7 291 .221219105
A 6,704,277 0.9457 7,089,222 7 141 .007500821
A 6,767,031 1.0538 6,421,552 11 82 .012466189
A 6,636,557 1.0284 6,453,284 14 44 .004155049
D3 13,474,150 1.0291 13,093,140 14 1,267 .005941433
G1 55,245,770 0.9297 59,423,223 5 14 .003672004
G1 48,412,750 1.0063 48,109,659 4 7 .015483089
G1 51,299,130 0.9726 52,744,324 3 6 .000410471
G1 50,988,550 0.9676 52,695,897 2 3 .001746410
Random Totals: 246,232,421   252,936,869 67 1,855  
Catg D1 Exception Values: 20,253,655   19,592,684      
Total Test Values (4): 266,486,076   272,529,553      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 13,626,478

Confidence Interval Values (5)

State Lower Limit: 258,903,075 (State Test Value minus Margin of Error Percent)
Local Test Value: 266,486,076 (Within Confidence Interval)
State Upper Limit: 286,156,031 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 270,732,960 (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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