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2009 Confidence Interval Detail
227/Travis
227-904/Pflugerville ISD

Category Summary

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

Stratum
Variance
A 1,030,601,561 0.9818 1,049,706,214 75 8,092 .004498169
A 1,160,032,410 1.0106 1,147,865,041 75 7,551 .003921685
A 1,207,450,859 1.0111 1,194,195,291 75 6,594 .003932989
A 1,339,287,323 1.0329 1,296,628,253 75 5,521 .009535852
B 118,304,876 1.1424 103,558,190 7 336 .013360772
B 224,306,332 0.9477 236,684,955 4 15 .001267306
B 89,077,180 0.9793 90,960,053 4 4 .002127007
B 112,179,831 1.0092 111,157,185 2 4 .000326138
F1 350,191,943 1.0664 328,387,043 7 425 .014223992
F1 387,192,057 1.0111 382,941,407 7 114 .000314803
F1 337,309,901 0.9575 352,281,881 6 30 .013828793
F1 248,175,706 1.0399 238,653,434 4 9 .001542068
L1 224,556,197 0.9986 224,871,016 10 474 .006916448
L1 185,555,454 0.9837 188,630,125 6 52 .001846407
L1 204,581,895 1.0733 190,610,170 6 10 .009517939
Random Totals: 7,218,803,525   7,137,130,258 363 29,231  
Catg D1 Exception Values: 4,628,918   4,530,163      
Catg C Exception Values: 417,030   414,500      
Total Test Values (4): 7,223,849,473   7,142,074,921      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 357,103,746

Confidence Interval Values (5)

State Lower Limit: 6,784,971,175 (State Test Value minus Margin of Error Percent)
Local Test Value: 7,223,849,473 (Within Confidence Interval)
State Upper Limit: 7,499,178,667 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,465,055,865 (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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