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2007 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 9,315,035,620 0.9974 9,339,317,846 90 99,964 .005430232
A 9,315,408,654 0.9877 9,431,415,059 97 46,926 .008481390
A 9,314,664,676 0.9903 9,405,901,925 92 22,545 .001407355
A 9,314,192,344 0.9896 9,412,077,955 98 7,674 .003218257
B 1,657,280,823 0.7666 2,161,858,626 24 5,904 .268272963
B 1,657,715,457 0.9754 1,699,523,741 7 423 .006693032
B 1,670,612,261 0.9622 1,736,242,217 6 137 .001621394
B 1,640,930,237 0.9869 1,662,711,761 6 46 .003827338
C 487,573,030 0.8654 563,407,707 12 12,035 .047620376
C 488,752,410 0.8630 566,341,147 11 1,542 .059489497
C 485,899,515 0.8271 587,473,721 9 452 .012349987
C 484,681,709 1.0311 470,062,757 7 113 .047025656
F1 5,867,799,829 0.8172 7,180,371,793 24 6,227 .063164985
F1 5,863,882,033 0.8440 6,947,727,527 10 1,134 .084678533
F1 5,885,548,642 0.9414 6,251,910,603 10 289 .013197981
F1 5,844,124,227 0.9910 5,897,199,018 5 54 .000323092
L1 2,239,856,884 1.1003 2,035,678,346 7 9,481 .026173661
L1 2,242,072,459 1.0591 2,116,960,116 7 1,315 .009897084
L1 2,241,453,049 1.0127 2,213,343,585 7 352 .010997653
L1 2,234,628,707 1.0031 2,227,722,766 6 74 .000080574
Random Totals: 78,252,112,566   81,907,248,216 535 216,687  
Catg D1 Exception Values: 3,614,770   4,041,045      
Total Test Values (4): 78,255,727,336   81,911,289,261      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 4,095,564,463

Confidence Interval Values (5)

State Lower Limit: 77,815,724,798 (State Test Value minus Margin of Error Percent)
Local Test Value: 78,255,727,336 (Within Confidence Interval)
State Upper Limit: 86,006,853,724 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 77,450,120,650 (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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