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2008 Confidence Interval Detail
043/Collin
043-914/Wylie ISD

Category Summary

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

Stratum
Variance
A 526,039,530 0.9900 531,353,061 24 4,078 .001798051
A 558,952,035 0.9862 566,773,509 25 3,599 .001643514
A 593,102,424 0.9985 593,993,414 22 3,182 .001513659
A 704,788,876 0.9876 713,637,987 23 2,684 .001792991
D3 58,308,759 0.8186 71,229,855 10 821 .003296002
F1 28,876,063 0.9827 29,384,413 7 87 .013819367
F1 44,917,722 1.0383 43,260,832 8 45 .009733186
F1 33,685,853 1.0653 31,621,002 5 14 .012394130
F1 72,590,038 0.9585 75,732,956 4 11 .002759723
L1 27,966,182 1.0974 25,484,037 7 203 .017378152
L1 23,445,385 1.0388 22,569,681 5 20 .002634327
L1 34,069,921 0.9878 34,490,708 4 6 .000265617
Random Totals: 2,706,742,788   2,739,531,455 144 14,750  
Catg D1 Exception Values: 728,895   714,463      
Catg L1 Exception Values: 56,102,950   61,452,449      
Total Test Values (4): 2,763,574,633   2,801,698,367      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 140,084,918

Confidence Interval Values (5)

State Lower Limit: 2,661,613,449 (State Test Value minus Margin of Error Percent)
Local Test Value: 2,763,574,633 (Within Confidence Interval)
State Upper Limit: 2,941,783,285 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,059,940,240 (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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