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2009 Confidence Interval Detail
188/Potter
188-901/Amarillo ISD

Category Summary

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

Stratum
Variance
A 1,307,950,677 1.0066 1,299,374,803 73 19,049 .034400931
A 1,301,847,424 0.9994 1,302,629,001 74 11,516 .017851908
A 1,309,909,278 0.9614 1,362,501,849 75 8,276 .026539639
A 1,319,743,335 0.9728 1,356,644,053 75 4,336 .024979575
B 80,862,736 0.9922 81,498,424 14 982 .092542960
B 71,425,251 0.8238 86,702,174 7 100 .098525358
B 80,714,331 0.8883 90,863,820 5 21 .064643042
B 94,096,369 0.9992 94,171,706 5 12 .011945429
F1 328,193,141 0.8760 374,649,704 30 1,881 .088801499
F1 336,373,324 0.6938 484,827,506 8 451 .282308300
F1 312,288,306 0.9265 337,062,392 7 134 .002514715
F1 349,208,261 0.9816 355,754,137 6 39 .000794518
L1 207,452,229 0.9948 208,536,619 7 2,016 .002502885
L1 212,714,723 0.9941 213,977,188 7 350 .000932655
L1 239,302,995 1.0100 236,933,658 6 94 .001355521
L1 199,981,871 1.0072 198,552,294 5 14 .000054055
Random Totals: 7,752,064,251   8,084,679,328 404 49,271  
Catg D1 Exception Values: 641,361   784,360      
Total Test Values (4): 7,752,705,612   8,085,463,688      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 404,273,184

Confidence Interval Values (5)

State Lower Limit: 7,681,190,504 (State Test Value minus Margin of Error Percent)
Local Test Value: 7,752,705,612 (Within Confidence Interval)
State Upper Limit: 8,489,736,872 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,215,805,166 (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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