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2008 Confidence Interval Detail
236/Walker
093-905/Richards ISD

Category Summary

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

Stratum
Variance
A 1,108,220 1.0387 1,066,930 6 27 .021277485
A 1,051,640 1.0248 1,026,190 5 17 .012246551
A 1,147,360 1.0389 1,104,399 4 13 .009549968
A 1,362,820 1.0293 1,324,026 4 10 .048889495
D3 19,156,875 0.9360 20,466,747 20 594 .068033466
Random Totals: 23,826,915   24,988,292 39 661  
Catg D1 Exception Values: 2,174,115   2,193,792      
Total Test Values (4): 26,001,030   27,182,084      

Margin of Error

Margin of Error Percent: 8.8267993
Margin of Error Value: 2,399,308

Confidence Interval Values (5)

State Lower Limit: 24,782,776 (State Test Value minus Margin of Error Percent)
Local Test Value: 26,001,030 (Within Confidence Interval)
State Upper Limit: 29,581,392 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 22,930,290 (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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