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2009 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 613,138,492 0.9918 618,207,796 48 4,704 .002663832
A 597,941,213 1.0126 590,500,902 50 3,740 .006643759
A 633,350,533 0.9830 644,303,696 50 3,228 .006496838
A 615,785,668 0.9999 615,847,253 51 2,260 .001369623
F1 47,215,201 0.9034 52,263,893 9 96 .024772783
F1 45,727,546 0.9424 48,522,438 6 30 .087317158
F1 50,059,460 0.8842 56,615,539 5 13 .013776707
F1 39,658,035 0.8996 44,084,076 3 4 .006392958
L1 29,956,523 0.9920 30,198,108 7 223 .006135789
L1 28,637,139 0.9791 29,248,431 5 23 .005689732
L1 18,422,721 0.9763 18,869,939 3 3 .000241480
Random Totals: 2,719,892,531   2,748,662,071 237 14,324  
Catg D1 Exception Values: 773,221   723,291      
Catg L1 Exception Values: 67,797,463   64,929,969      
Total Test Values (4): 2,788,463,215   2,814,315,331      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 140,715,767

Confidence Interval Values (5)

State Lower Limit: 2,673,599,564 (State Test Value minus Margin of Error Percent)
Local Test Value: 2,788,463,215 (Within Confidence Interval)
State Upper Limit: 2,955,031,098 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,129,753,162 (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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