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2007 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 534,276,143 1.0037 532,306,609 25 3,670 .001438499
A 534,205,270 0.9994 534,525,986 25 3,084 .001307400
A 534,297,163 0.9997 534,457,500 25 2,623 .001256839
A 534,174,151 1.0089 529,461,940 25 1,898 .002900373
L1 27,839,045 0.9327 29,847,802 10 199 .038428583
L1 31,377,033 0.9910 31,661,991 8 18 .002043929
L1 25,851,735 1.0265 25,184,350 3 4 .000403215
Random Totals: 2,222,020,540   2,217,446,178 121 11,496  
Catg D1 Exception Values: 781,518   726,432      
Catg L1 Exception Values: 70,948,752   70,027,671      
Total Test Values (4): 2,293,750,810   2,288,200,281      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 114,410,014

Confidence Interval Values (5)

State Lower Limit: 2,173,790,267 (State Test Value minus Margin of Error Percent)
Local Test Value: 2,293,750,810 (Within Confidence Interval)
State Upper Limit: 2,402,610,295 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,794,355,919 (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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