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2009 Confidence Interval Detail
057/Dallas
057-903/Carrollton-Farmers Branch ISD

Category Summary

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

Stratum
Variance
A 850,642,780 0.9877 861,235,983 50 7,140 .002636921
A 873,110,880 0.9529 916,267,058 50 4,948 .024115992
A 932,352,440 0.9748 956,455,109 50 3,760 .002590204
A 899,981,630 0.9656 932,043,942 50 2,257 .005891236
B 335,461,290 0.9197 364,750,777 6 50 .014202536
B 335,986,090 0.9995 336,154,167 5 21 .002115079
B 318,198,930 0.9619 330,802,505 5 14 .002857728
B 335,631,240 1.0154 330,540,910 4 10 .001584333
C 109,588,500 0.9512 115,210,786 7 1,084 .030494904
C 87,288,900 0.9543 91,469,035 7 91 .025605738
C 88,072,590 1.0574 83,291,649 6 34 .021724939
C 72,184,920 1.0031 71,961,838 5 11 .004057877
F1 1,095,059,710 0.9610 1,139,500,219 8 674 .008644156
F1 1,006,688,270 0.9160 1,099,004,662 8 200 .011230813
F1 954,999,120 1.0089 946,574,606 7 76 .006657118
F1 811,078,850 0.9580 846,637,630 6 27 .006786046
L1 527,866,390 1.0672 494,627,427 7 1,089 .026773918
L1 541,849,600 1.0471 517,476,459 7 164 .004753530
L1 482,198,840 1.0868 443,686,824 7 45 .025774187
L1 637,929,050 1.0133 629,555,956 3 6 .000939912
Random Totals: 11,296,170,020   11,507,247,542 298 21,701  
Catg D1 Exception Values: 55,635   73,934      
Total Test Values (4): 11,296,225,655   11,507,321,476      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 575,366,074

Confidence Interval Values (5)

State Lower Limit: 10,931,955,402 (State Test Value minus Margin of Error Percent)
Local Test Value: 11,296,225,655 (Within Confidence Interval)
State Upper Limit: 12,082,687,550 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 10,849,466,728 (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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