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2008 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 6,738,289 0.7734 8,712,554 7 291 .014198038
A 7,503,359 0.7647 9,812,160 12 162 .400927110
A 6,981,310 0.8988 7,767,368 10 92 .003872040
A 7,759,810 0.9431 8,227,982 10 60 .013171869
D3 15,650,168 1.0137 15,438,658 11 1,249 .103701945
G1 51,397,140 0.9470 54,273,643 5 16 .076602566
G1 53,463,200 0.9423 56,736,920 4 10 .010943718
G1 52,574,550 0.9937 52,907,870 4 7 .006689870
G1 42,455,570 0.9328 45,514,119 3 4 .009970094
Random Totals: 244,523,396   259,391,274 66 1,891  
Catg D1 Exception Values: 18,566,285   18,455,280      
Total Test Values (4): 263,089,681   277,846,554      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 13,892,328

Confidence Interval Values (5)

Local Test Value: 263,089,681 (Outside Confidence Interval)
State Lower Limit: 263,954,226 (State Test Value minus Margin of Error Percent)
State Upper Limit: 291,738,882 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 312,800,320 (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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