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2008 Confidence Interval Detail
043/Collin
043-910/Plano ISD

Category Summary

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

Stratum
Variance
A 4,735,025,546 0.9978 4,745,465,570 95 28,524 .001733004
A 4,924,296,509 0.9892 4,978,059,552 96 21,280 .007165792
A 5,382,320,904 0.9972 5,397,433,718 95 16,513 .001367219
A 5,074,886,796 0.9953 5,098,851,398 98 7,749 .000962543
B 643,305,743 0.9512 676,309,654 10 140 .011230549
B 469,280,057 0.9956 471,354,015 6 31 .003762764
B 831,457,740 1.0012 830,461,187 6 40 .002576940
B 806,753,505 0.9568 843,178,830 5 25 .015753956
C 55,126,434 0.9289 59,345,930 26 368 .018871164
C 66,251,033 0.9158 72,342,250 7 113 .047118204
C 72,781,614 0.9542 76,275,009 6 58 .038895199
C 51,831,354 0.9477 54,691,732 5 15 .006086048
D3 278,025,412 1.0670 260,567,396 18 912 .053327634
F1 1,609,324,635 0.9690 1,660,809,737 7 869 .027955464
F1 1,818,933,526 0.8850 2,055,292,120 7 232 .071176673
F1 1,842,852,511 1.0125 1,820,101,245 6 85 .001553903
F1 1,937,831,233 0.9979 1,941,909,242 5 27 .001618653
L1 567,937,756 0.9760 581,903,439 7 2,442 .011890055
L1 543,806,838 0.9913 548,579,479 7 251 .000851789
L1 626,791,558 1.0123 619,175,697 6 69 .000579887
L1 749,407,719 0.9295 806,248,218 5 20 .151661488
Random Totals: 33,088,228,423   33,598,355,418 523 79,763  
Catg D1 Exception Values: 1,667,162   1,712,021      
Total Test Values (4): 33,089,895,585   33,600,067,439      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 1,680,003,372

Confidence Interval Values (5)

State Lower Limit: 31,920,064,067 (State Test Value minus Margin of Error Percent)
Local Test Value: 33,089,895,585 (Within Confidence Interval)
State Upper Limit: 35,280,070,811 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 33,753,289,517 (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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