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2011 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 1,326,462,833 1.0229 1,296,766,872 93 19,253 .016845415
A 1,305,775,214 0.9969 1,309,835,705 105 11,430 .010662168
A 1,307,238,215 1.0096 1,294,808,058 105 8,181 .012644194
A 1,350,789,897 0.9752 1,385,141,404 98 4,327 .009938690
B 95,174,842 0.9485 100,342,480 12 955 .037343086
B 88,604,385 0.8796 100,732,589 11 74 .157049826
B 92,915,058 0.9728 95,513,012 10 21 .007131714
B 89,226,238 0.9798 91,065,766 7 10 .002487003
F1 333,804,637 0.9373 356,134,255 29 1,807 .037277444
F1 335,654,752 0.9154 366,675,499 16 448 .027554536
F1 339,723,334 0.8816 385,348,609 12 148 .026192904
F1 340,081,228 1.0490 324,195,642 10 38 .013421101
L1 207,040,208 0.9965 207,767,394 10 2,045 .017930336
L1 208,023,074 1.0168 204,586,029 10 357 .004191953
L1 202,602,445 1.0238 197,892,601 10 87 .003838908
L1 206,513,575 0.9993 206,658,236 10 17 .005148121
Random Totals: 7,829,629,935   7,923,464,151 548 49,198  
Catg D1 Exception Values: 624,420   655,452      
Total Test Values (4): 7,830,254,355   7,924,119,603      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 396,205,980

Confidence Interval Values (5)

State Lower Limit: 7,527,913,623 (State Test Value minus Margin of Error Percent)
Local Test Value: 7,830,254,355 (Within Confidence Interval)
State Upper Limit: 8,320,325,583 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,380,921,876 (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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