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2008 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 1,228,610,605 1.0053 1,222,133,299 31 18,575 .032273028
A 1,238,288,521 0.9641 1,284,398,424 34 11,316 .011373091
A 1,351,159,684 0.9867 1,369,372,336 33 8,817 .008103935
A 1,371,978,531 0.9837 1,394,712,342 35 4,675 .018024606
B 71,288,829 1.0135 70,339,249 15 958 .022370145
B 68,846,110 0.8606 79,997,804 7 137 .110160792
B 68,998,325 1.0483 65,819,255 5 23 .001300482
B 97,197,781 1.0160 95,667,107 4 14 .003685669
F1 315,914,345 0.8820 358,179,529 36 1,857 .042668650
F1 316,190,129 1.0263 308,087,430 5 429 .005590051
F1 311,315,636 0.9858 315,799,996 6 132 .001516876
F1 320,317,570 0.9764 328,059,781 6 36 .000851481
L1 204,518,972 0.9819 208,289,003 7 1,925 .000693922
L1 207,551,959 1.0354 200,455,823 7 353 .002940929
L1 205,689,225 1.0025 205,176,284 6 88 .000509001
L1 227,785,858 1.0070 226,202,441 5 18 .000220547
Random Totals: 7,605,652,080   7,732,690,103 242 49,353  
Catg D1 Exception Values: 625,168   714,851      
Total Test Values (4): 7,606,277,248   7,733,404,954      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 386,670,248

Confidence Interval Values (5)

State Lower Limit: 7,346,734,706 (State Test Value minus Margin of Error Percent)
Local Test Value: 7,606,277,248 (Within Confidence Interval)
State Upper Limit: 8,120,075,202 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,046,915,843 (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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