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2008 Confidence Interval Detail
061/Denton
061-902/Lewisville ISD

Category Summary

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

Stratum
Variance
A 3,453,413,234 0.9892 3,491,117,301 66 23,362 .000624042
A 3,666,995,463 0.9996 3,668,462,848 73 17,445 .001410989
A 3,893,578,756 0.9980 3,901,381,519 82 12,838 .002759997
A 4,109,644,640 0.9866 4,165,461,829 75 7,393 .002974700
B 328,952,863 0.9856 333,758,992 7 186 .003190971
B 313,489,869 0.9972 314,370,105 5 23 .001541393
B 407,577,796 0.9307 437,926,073 5 19 .003332027
B 370,535,917 0.8378 442,272,520 4 13 .025498790
C 119,056,295 1.0038 118,605,594 14 1,033 .003885995
C 129,060,487 1.0293 125,386,658 9 273 .013391183
C 143,522,110 0.9771 146,885,795 7 122 .012693542
C 172,646,129 0.9795 176,259,448 6 46 .003839677
D3 272,402,905 0.8640 315,281,140 10 1,544 .051109465
F1 929,889,764 0.9905 938,808,444 12 842 .009016720
F1 995,499,491 0.9343 1,065,503,041 9 311 .052916853
F1 876,570,069 0.9201 952,690,000 8 101 .006370380
F1 1,024,695,043 0.9957 1,029,120,260 6 43 .002209752
L1 259,276,815 1.0946 236,869,007 7 1,598 .029451773
L1 245,520,094 0.9836 249,613,760 7 251 .035528522
L1 258,336,547 0.8059 320,556,579 6 80 .183883056
L1 225,423,902 1.0543 213,813,812 5 20 .004042622
Random Totals: 22,196,088,189   22,644,144,725 423 67,543  
Catg D1 Exception Values: 2,005,929   1,647,265      
Total Test Values (4): 22,198,094,118   22,645,791,990      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 1,132,289,600

Confidence Interval Values (5)

State Lower Limit: 21,513,502,390 (State Test Value minus Margin of Error Percent)
Local Test Value: 22,198,094,118 (Within Confidence Interval)
State Upper Limit: 23,778,081,590 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 22,810,257,242 (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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