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2009 Confidence Interval Detail
057/Dallas
057-905/Dallas ISD

Category Summary

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

Stratum
Variance
A 8,884,295,900 0.9873 8,998,577,839 100 97,115 .024561525
A 9,905,068,640 0.9524 10,400,114,070 100 43,703 .011216898
A 10,073,556,560 0.9519 10,582,578,590 100 20,510 .011325532
A 10,125,422,430 0.9651 10,491,578,520 100 6,629 .017203272
B 1,874,815,320 0.9200 2,037,842,739 16 5,574 .048794771
B 1,674,516,020 1.1014 1,520,352,297 6 347 .047374928
B 1,891,358,790 0.9891 1,912,201,790 8 130 .003470893
B 1,765,123,240 0.9934 1,776,850,453 6 47 .001703762
C 667,411,650 1.1028 605,197,361 7 10,513 .009005468
C 607,256,540 0.9547 636,070,535 7 1,097 .069198011
C 598,497,020 1.0053 595,341,709 7 306 .002705454
C 545,291,920 1.0089 540,481,633 6 79 .003360129
F1 6,178,588,000 0.9815 6,295,046,358 13 6,239 .035386072
F1 5,873,446,510 0.9328 6,296,576,447 12 1,054 .006821603
F1 5,615,638,110 0.9048 6,206,496,585 13 248 .011769083
F1 4,617,953,170 0.9249 4,992,921,581 10 47 .001783018
L1 2,343,432,570 1.1133 2,104,942,576 7 9,056 .018380628
L1 2,359,084,920 0.9896 2,383,877,243 7 1,264 .009692870
L1 2,516,960,990 1.0902 2,308,714,906 7 368 .008097624
L1 2,472,400,500 1.0040 2,462,550,299 6 83 .000370280
Random Totals: 80,590,118,800   83,148,313,531 538 204,409  
Catg D1 Exception Values: 3,785,181   4,329,896      
Total Test Values (4): 80,593,903,981   83,152,643,427      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 4,157,632,171

Confidence Interval Values (5)

State Lower Limit: 78,995,011,256 (State Test Value minus Margin of Error Percent)
Local Test Value: 80,593,903,981 (Within Confidence Interval)
State Upper Limit: 87,310,275,598 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 78,626,228,844 (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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