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2008 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 987,486,066 1.0017 985,810,189 47 6,651 .003070744
A 1,133,726,630 0.9934 1,141,258,939 47 5,964 .004147228
A 1,120,547,194 0.9904 1,131,408,718 48 4,532 .002478102
A 1,265,896,522 0.9953 1,271,874,331 50 3,073 .002420512
D3 204,508,998 1.1387 179,598,663 7 418 .101734468
F1 198,426,950 0.9542 207,951,111 7 163 .034944135
F1 172,387,791 0.9882 174,446,257 6 51 .004693715
F1 194,406,696 0.8838 219,966,843 5 23 .026171025
F1 256,206,602 0.9127 280,712,832 4 10 .017374924
L1 123,565,451 1.0219 120,917,361 8 415 .004277156
L1 134,503,350 0.9925 135,519,748 6 37 .004603232
L1 126,663,057 1.0060 125,907,611 4 6 .000022690
Random Totals: 5,918,325,307   5,975,372,603 239 21,343  
Catg D1 Exception Values: 635,883   701,417      
Total Test Values (4): 5,918,961,190   5,976,074,020      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 298,803,701

Confidence Interval Values (5)

State Lower Limit: 5,677,270,319 (State Test Value minus Margin of Error Percent)
Local Test Value: 5,918,961,190 (Within Confidence Interval)
State Upper Limit: 6,274,877,721 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 6,758,496,000 (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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