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2010 Confidence Interval Detail
227/Travis
246-909/Round Rock ISD

Category Summary

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

Stratum
Variance
A 883,864,780 0.9841 898,145,290 90 4,488 .002813602
A 942,944,899 0.9821 960,131,248 57 3,055 .002575745
A 769,388,497 0.9772 787,339,845 58 1,946 .002566179
A 594,748,902 0.9595 619,852,946 20 1,116 .001764982
B 164,420,089 0.9590 171,449,519 9 137 .002848626
B 85,059,378 0.9686 87,816,826 5 5 .000548060
B 120,860,376 0.9601 125,883,112 3 5 .000185295
B 66,040,057 0.9637 68,527,609 2 2 .000476023
F1 226,632,225 0.9430 240,331,098 9 116 .002952754
F1 204,781,728 0.9762 209,774,358 8 32 .003198686
F1 209,739,645 0.9703 216,159,585 6 13 .001858456
F1 126,617,687 1.0073 125,700,076 3 3 .000324236
L1 120,115,167 0.9932 120,937,542 10 222 .000109622
L1 114,812,814 0.9801 117,143,979 7 25 .021873258
L1 100,338,396 0.9971 100,630,224 5 6 .007727283
Random Totals: 4,730,364,640   4,849,823,257 292 11,171  
Catg J Exception Values: 14,784,344   17,069,424      
Catg D1 Exception Values: 231,181   177,826      
Catg L1 Exception Values: 109,869,882   104,120,851      
Total Test Values (4): 4,855,250,047   4,971,191,358      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 248,559,568

Confidence Interval Values (5)

State Lower Limit: 4,722,631,790 (State Test Value minus Margin of Error Percent)
Local Test Value: 4,855,250,047 (Within Confidence Interval)
State Upper Limit: 5,219,750,926 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 5,154,687,973 (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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