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2009 Confidence Interval Detail
057/Dallas
057-916/Richardson ISD

Category Summary

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

Stratum
Variance
A 2,364,160,810 0.9488 2,491,737,785 75 17,667 .009364391
A 2,371,658,570 0.9486 2,500,167,162 75 12,415 .007898932
A 2,390,776,040 0.9498 2,517,136,281 75 9,227 .010443852
A 2,394,172,130 0.9582 2,498,614,204 75 5,798 .006820322
B 348,019,370 0.9593 362,784,708 14 678 .023808871
B 289,183,690 0.9612 300,856,939 6 49 .012384812
B 299,313,220 0.9361 319,744,920 6 25 .002424597
B 267,120,940 1.0130 263,692,932 4 10 .007905257
F1 1,205,842,450 0.9628 1,252,432,956 8 823 .004676097
F1 1,036,541,730 0.9286 1,116,241,363 7 211 .011984049
F1 1,109,706,710 0.9114 1,217,584,716 6 80 .009009304
F1 865,099,450 0.8996 961,649,011 6 14 .003894553
L1 348,004,030 1.2366 281,420,047 7 2,207 .031744580
L1 345,042,520 1.0151 339,909,881 7 330 .001411699
L1 355,133,800 1.0080 352,315,278 7 101 .001830504
L1 376,415,010 0.9262 406,407,914 5 22 .003328647
Random Totals: 16,366,190,470   17,182,696,097 383 49,657  
Catg D1 Exception Values: 9,121   11,407      
Total Test Values (4): 16,366,199,591   17,182,707,504      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 859,135,375

Confidence Interval Values (5)

State Lower Limit: 16,323,572,129 (State Test Value minus Margin of Error Percent)
Local Test Value: 16,366,199,591 (Within Confidence Interval)
State Upper Limit: 18,041,842,879 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 16,817,288,516 (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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