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2007 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 1,005,109,459 0.9560 1,051,369,727 25 8,014 .005155285
A 1,003,658,847 0.9730 1,031,509,606 25 6,580 .001071262
A 1,004,377,682 0.9828 1,021,955,313 25 5,530 .002852743
A 1,004,193,145 0.9910 1,013,312,962 25 4,242 .006665809
B 94,218,294 0.9837 95,779,500 19 259 .005726387
B 104,911,061 1.0694 98,102,731 4 8 .002796352
B 98,292,653 0.9327 105,385,068 3 4 .031669172
F1 309,588,583 0.8961 345,484,414 9 351 .066221230
F1 308,021,480 0.9038 340,807,125 7 81 .032643494
F1 318,843,635 0.9616 331,576,160 5 24 .032080969
F1 294,899,111 1.0821 272,524,823 5 10 .003581085
L1 203,875,612 1.0199 199,897,649 7 417 .003807851
L1 207,656,807 0.9851 210,797,693 8 67 .004812284
L1 208,216,151 0.9817 212,097,536 5 19 .000551290
Random Totals: 6,165,862,520   6,330,600,307 172 25,606  
Catg D1 Exception Values: 4,426,557   3,788,497      
Catg B Exception Values: 120,622,076   119,870,378      
Catg L1 Exception Values: 355,409,271   371,051,649      
Total Test Values (4): 6,646,320,424   6,825,310,831      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 341,265,542

Confidence Interval Values (5)

State Lower Limit: 6,484,045,289 (State Test Value minus Margin of Error Percent)
Local Test Value: 6,646,320,424 (Within Confidence Interval)
State Upper Limit: 7,166,576,373 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 6,599,540,933 (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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