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2006 Confidence Interval Detail
210/Shelby
210-901/Center ISD

Category Summary

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

Stratum
Variance
A 28,288,788 0.7393 38,264,288 20 950 .092461004
A 28,291,981 0.8608 32,867,078 18 544 .095850400
A 28,293,318 0.8077 35,029,489 15 345 .023280577
A 28,253,059 0.9267 30,487,816 15 187 .012103160
D3 68,925,053 0.8914 77,322,249 20 4,541 .124868991
F1 11,756,188 0.9560 12,297,268 11 235 .028196154
F1 11,607,855 0.7679 15,116,363 10 96 .055810263
F1 12,069,773 0.8497 14,204,746 8 37 .026443803
F1 11,291,785 0.8681 13,007,470 6 8 .022899191
L1 9,404,164 1.0142 9,272,495 7 215 .002077738
L1 9,593,498 1.0013 9,581,043 6 43 .000060210
L1 13,210,637 0.9901 13,342,730 4 10 .000400585
Random Totals: 260,986,099   300,793,035 140 7,211  
Catg J Exception Values: 17,278,214   19,821,713      
Catg D1 Exception Values: 19,717,432   18,785,595      
Catg L1 Exception Values: 7,610,401   6,829,046      
Total Test Values (4): 305,592,146   346,229,389      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 17,311,469

Confidence Interval Values (5)

Local Test Value: 305,592,146 (Outside Confidence Interval)
State Lower Limit: 328,917,920 (State Test Value minus Margin of Error Percent)
State Upper Limit: 363,540,858 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 343,069,196 (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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