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2006 Confidence Interval Detail
057/Dallas
057-903/Carrollton-Farmers Branch

Category Summary

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

Stratum
Variance
A 1,232,750,666 1.0125 1,217,531,522 48 10,182 .002283208
A 1,233,023,771 0.9994 1,233,764,029 47 8,020 .000764307
A 1,232,051,084 0.9958 1,237,247,524 48 6,074 .001307112
A 1,232,336,554 0.9895 1,245,413,395 48 3,795 .000500159
B 441,068,144 1.0256 430,058,643 7 72 .019190884
B 448,625,094 1.0251 437,640,322 7 37 .002360989
B 436,067,988 0.9961 437,775,312 6 24 .017341126
B 426,430,159 0.9660 441,439,088 7 14 .010170760
C 98,107,075 0.8784 111,688,382 7 357 .026684559
C 97,958,258 0.9471 103,429,689 7 91 .007337478
C 98,835,622 1.0031 98,530,178 7 42 .006676173
C 97,167,046 1.0414 93,304,250 7 17 .012110462
F1 945,098,878 0.9358 1,009,936,822 15 678 .025300145
F1 940,025,094 0.9404 999,601,333 9 235 .013677345
F1 952,203,556 0.8888 1,071,336,134 9 95 .034520612
F1 932,078,978 0.9325 999,548,502 6 36 .010162080
L1 479,849,114 1.0465 458,527,581 7 1,148 .001933027
L1 483,143,504 1.0853 445,170,463 7 181 .017492971
L1 488,844,020 1.0298 474,698,019 7 55 .000969242
L1 467,039,683 0.9895 471,995,637 6 10 .000391400
Random Totals: 12,762,704,288   13,018,636,825 312 31,163  
Catg D1 Exception Values: 4,997   3,817      
Total Test Values (4): 12,762,709,285   13,018,640,642      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 650,932,032

Confidence Interval Values (5)

State Lower Limit: 12,367,708,610 (State Test Value minus Margin of Error Percent)
Local Test Value: 12,762,709,285 (Within Confidence Interval)
State Upper Limit: 13,669,572,674 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 13,300,070,526 (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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