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2010 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 1,180,756,171 0.9770 1,208,552,887 50 7,922 .014358020
A 1,171,774,122 0.9953 1,177,307,467 50 5,997 .005437696
A 1,269,443,154 0.9958 1,274,797,303 50 4,749 .003142961
A 1,158,291,058 0.9926 1,166,926,313 49 2,621 .003255096
F1 291,958,100 0.9784 298,403,618 10 195 .135410868
F1 254,319,213 0.8855 287,204,080 12 53 .029541015
F1 202,429,568 0.9552 211,923,752 7 15 .008991954
F1 273,346,543 1.0164 268,935,993 2 5 .000704770
L1 118,436,864 1.0288 115,121,369 10 523 .002912772
L1 113,569,372 0.8950 126,893,153 9 63 .060288057
L1 124,628,261 0.9525 130,843,319 5 13 .009820013
L1 66,524,650 0.9962 66,778,408 3 3 .000096523
Random Totals: 6,225,477,076   6,333,687,662 257 22,159  
Catg J Exception Values: 64,309,047   75,054,828      
Catg D1 Exception Values: 653,561   719,708      
Catg B Exception Values: 281,045,874   308,087,043      
Total Test Values (4): 6,571,485,558   6,717,549,241      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 335,877,462

Confidence Interval Values (5)

State Lower Limit: 6,381,671,779 (State Test Value minus Margin of Error Percent)
Local Test Value: 6,571,485,558 (Within Confidence Interval)
State Upper Limit: 7,053,426,703 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,254,839,590 (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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