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2009 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 1,215,340,007 0.9818 1,237,869,227 49 8,084 .003481934
A 1,044,746,380 0.9895 1,055,832,623 48 5,368 .002447813
A 1,160,829,290 1.0013 1,159,322,171 49 4,471 .002050354
A 1,250,845,820 1.0031 1,246,980,181 46 2,903 .001339690
F1 235,571,490 0.9189 256,362,488 9 181 .036386523
F1 224,941,658 0.9135 246,241,552 7 61 .010547002
F1 222,365,429 0.8162 272,439,879 5 22 .082864278
F1 331,959,846 0.9167 362,124,846 4 8 .002286986
L1 116,993,678 0.9428 124,091,725 8 515 .009047254
L1 98,579,714 0.9620 102,473,715 6 56 .006980727
L1 124,865,786 0.9427 132,455,485 4 12 .024953153
L1 103,359,486 0.9515 108,627,941 3 4 .009135052
Random Totals: 6,130,398,584   6,304,821,833 238 21,685  
Catg D1 Exception Values: 689,229   716,003      
Total Test Values (4): 6,131,087,813   6,305,537,836      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 315,276,892

Confidence Interval Values (5)

State Lower Limit: 5,990,260,944 (State Test Value minus Margin of Error Percent)
Local Test Value: 6,131,087,813 (Within Confidence Interval)
State Upper Limit: 6,620,814,728 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,132,837,054 (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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