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2010 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 2,337,121,540 0.9684 2,413,384,490 75 17,507 .006683305
A 2,307,314,860 0.9632 2,395,468,086 76 12,092 .008449652
A 2,405,318,460 0.9575 2,512,081,943 74 9,258 .004423398
A 2,454,094,420 0.9705 2,528,690,799 75 5,977 .009301616
B 308,276,320 1.0240 301,051,094 20 580 .006655728
B 295,984,030 0.9298 318,330,856 8 55 .041017876
B 289,987,490 0.9617 301,536,331 7 22 .007641430
B 204,718,180 0.9793 209,045,420 5 8 .002689841
F1 1,087,985,000 0.9937 1,094,882,761 12 839 .002207800
F1 947,984,510 0.9799 967,429,850 10 220 .018926742
F1 932,405,390 0.9210 1,012,383,702 9 84 .007033741
F1 988,906,630 0.8869 1,115,014,804 7 22 .056250678
L1 354,257,800 1.1174 317,037,587 10 2,122 .010306468
L1 359,374,910 1.0950 328,196,265 10 325 .014149173
L1 305,956,920 1.0330 296,182,885 9 84 .007759184
L1 319,745,390 0.9672 330,588,699 6 17 .001264154
Random Totals: 15,899,431,850   16,441,305,572 413 49,212  
Catg J Exception Values: 169,403,428   211,448,503      
Catg D1 Exception Values: 8,663   10,580      
Total Test Values (4): 16,068,843,941   16,652,764,655      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 832,638,233

Confidence Interval Values (5)

State Lower Limit: 15,820,126,422 (State Test Value minus Margin of Error Percent)
Local Test Value: 16,068,843,941 (Within Confidence Interval)
State Upper Limit: 17,485,402,888 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 16,231,882,941 (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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