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2007 Confidence Interval Detail
043/Collin
043-901/Allen ISD

Category Summary

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

Stratum
Variance
A 1,037,684,769 0.9948 1,043,108,935 50 6,486 .001321178
A 1,038,746,971 0.9975 1,041,350,347 49 5,087 .001658221
A 1,036,810,901 0.9950 1,042,021,006 50 4,043 .002261028
A 1,037,353,041 0.9967 1,040,787,640 50 2,517 .001307240
F1 184,352,932 0.9667 190,703,354 7 144 .003405914
F1 181,386,545 0.8192 221,419,122 5 54 .031897496
F1 190,002,672 0.9346 203,298,386 5 20 .032220459
F1 175,734,179 0.8525 206,139,799 3 6 .018595202
L1 111,996,004 0.9475 118,201,587 8 413 .015363035
L1 119,805,843 0.9699 123,523,913 9 28 .002176523
L1 111,594,971 0.9838 113,432,579 3 5 .000921430
Random Totals: 5,225,468,828   5,343,986,668 239 18,803  
Catg D1 Exception Values: 734,274   731,840      
Catg L1 Exception Values: 125,003,005   135,508,280      
Total Test Values (4): 5,351,206,107   5,480,226,788      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 274,011,339

Confidence Interval Values (5)

State Lower Limit: 5,206,215,449 (State Test Value minus Margin of Error Percent)
Local Test Value: 5,351,206,107 (Within Confidence Interval)
State Upper Limit: 5,754,238,127 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 6,132,400,919 (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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