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2009 Confidence Interval Detail
139/Lamar
139-911/North Lamar ISD

Category Summary

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

Stratum
Variance
A 87,404,780 0.9773 89,434,953 18 1,465 .047362136
A 87,724,420 0.9530 92,050,808 19 925 .007068429
A 89,065,580 0.9788 90,994,667 14 638 .010064702
A 88,305,669 1.0127 87,198,251 13 363 .008578405
D3 194,762,027 0.8916 218,441,035 29 7,692 .061454455
F1 21,797,680 1.0540 20,680,911 7 173 .008935265
F1 20,323,380 0.8487 23,946,483 6 52 .016616243
F1 20,409,410 1.0097 20,213,341 5 17 .001232760
L1 15,474,010 1.0247 15,101,015 9 225 .003388918
L1 13,772,790 1.0645 12,938,271 6 30 .056277752
L1 17,344,010 0.9836 17,633,194 3 6 .000188106
Random Totals: 656,383,756   688,632,929 129 11,586  
Catg D1 Exception Values: 19,208,521   16,172,031      
Catg F1 Exception Values: 20,166,200   22,485,571      
Total Test Values (4): 695,758,477   727,290,531      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 36,364,527

Confidence Interval Values (5)

State Lower Limit: 690,926,004 (State Test Value minus Margin of Error Percent)
Local Test Value: 695,758,477 (Within Confidence Interval)
State Upper Limit: 763,655,058 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 831,456,369 (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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