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2009 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 4,999,357,096 0.9821 5,090,476,628 74 29,860 .002520636
A 5,022,814,077 0.9898 5,074,574,739 75 21,230 .002255584
A 5,004,462,884 0.9825 5,093,600,900 75 15,115 .003280102
A 5,017,527,395 0.9896 5,070,258,079 73 7,736 .006483201
B 769,059,185 0.7481 1,028,016,555 10 169 .042057175
B 643,143,083 0.8480 758,423,447 7 39 .051759495
B 740,121,919 0.8663 854,348,285 7 32 .005311975
B 415,877,789 0.9654 430,782,877 5 12 .000746681
C 58,570,058 0.9914 59,078,130 8 355 .001009828
C 65,113,582 1.0688 60,922,139 10 109 .021586249
C 48,233,214 0.9861 48,913,106 6 39 .008931467
C 48,833,753 0.9947 49,093,951 5 15 .000432667
D3 238,271,906 0.9684 246,046,991 10 873 .047969866
F1 1,823,680,214 0.8278 2,203,044,472 16 901 .208150762
F1 1,725,017,381 0.9513 1,813,326,375 7 193 .011868362
F1 1,740,932,937 0.8764 1,986,459,307 8 76 .024813614
F1 1,581,764,535 0.9670 1,635,744,090 8 24 .004632939
L1 648,060,382 0.9890 655,268,334 8 2,303 .000965122
L1 630,029,175 1.0245 614,962,592 7 220 .002462589
L1 582,279,345 0.9869 590,008,456 6 47 .002636825
L1 621,277,941 0.9312 667,179,919 5 16 .008755157
Random Totals: 32,424,427,851   34,030,529,372 430 79,364  
Catg D1 Exception Values: 1,721,037   1,725,330      
Total Test Values (4): 32,426,148,888   34,032,254,702      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 1,701,612,735

Confidence Interval Values (5)

State Lower Limit: 32,330,641,967 (State Test Value minus Margin of Error Percent)
Local Test Value: 32,426,148,888 (Within Confidence Interval)
State Upper Limit: 35,733,867,437 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 33,724,794,997 (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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