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2009 Confidence Interval Detail
133/Kerr
133-901/Center Point ISD

Category Summary

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

Stratum
Variance
A 18,072,621 0.8743 20,670,961 8 349 .044834623
A 17,433,943 0.9284 18,778,482 7 183 .012418694
A 17,137,310 0.8772 19,536,377 8 109 .023278094
A 20,072,264 0.9222 21,765,630 7 80 .019201689
D3 124,243,492 0.8643 143,750,425 21 2,119 .080150636
F1 3,212,211 0.9547 3,364,629 7 32 .059402383
F1 3,955,182 0.9013 4,388,308 7 12 .020116595
F1 3,047,249 1.0238 2,976,410 3 4 .003278030
L1 2,796,207 0.9988 2,799,566 6 27 .003661128
L1 5,611,397 0.9353 5,999,569 4 7 .042051904
Random Totals: 215,581,876   244,030,357 78 2,922  
Catg D1 Exception Values: 3,254,466   3,524,834      
Catg F1 Exception Values: 3,128,295   2,920,321      
Catg L1 Exception Values: 4,747,451   4,482,543      
Total Test Values (4): 226,712,088   254,958,055      

Margin of Error

Margin of Error Percent: 7.1503495
Margin of Error Value: 18,230,392

Confidence Interval Values (5)

Local Test Value: 226,712,088 (Outside Confidence Interval)
State Lower Limit: 236,727,663 (State Test Value minus Margin of Error Percent)
State Upper Limit: 273,188,447 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 211,203,188 (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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