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2006 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 4,878,840 0.9553 5,107,129 20 84 .009871586
D3 15,835,760 1.0623 14,907,051 20 576 .034824833
Random Totals: 20,714,600   20,014,180 40 660  
Catg D1 Exception Values: 2,006,836   2,180,195      
Total Test Values (4): 22,721,436   22,194,375      

Margin of Error

Margin of Error Percent: 5.6350765
Margin of Error Value: 1,250,670

Confidence Interval Values (5)

State Lower Limit: 20,943,705 (State Test Value minus Margin of Error Percent)
Local Test Value: 22,721,436 (Within Confidence Interval)
State Upper Limit: 23,445,045 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 19,649,512 (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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