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2008 Confidence Interval Detail
227/Travis
227-901/Austin ISD

Category Summary

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

Stratum
Variance
A 6,947,871,430 0.9372 7,413,435,158 75 48,540 .026149797
A 9,028,124,356 0.9628 9,376,946,776 75 40,779 .007371628
A 8,916,560,229 0.9729 9,164,929,827 75 26,285 .007096024
A 10,095,045,182 0.9256 10,906,487,880 74 14,896 .013400573
B 1,771,158,916 0.9716 1,822,930,132 57 7,617 .003441173
B 1,719,664,623 0.8219 2,092,303,958 46 1,306 .055223075
B 1,985,357,433 0.8682 2,286,751,247 12 166 .010292105
B 2,224,061,324 0.9039 2,460,517,009 13 66 .006297670
C 181,712,936 0.7055 257,566,174 52 2,196 .352398043
C 174,477,991 0.8454 206,385,132 22 583 .070961205
C 159,877,260 0.9649 165,693,087 8 197 .044494276
C 114,736,737 1.0004 114,690,861 7 25 .000109521
D3 218,528,340 1.3436 162,643,897 12 1,596 .560008425
F1 3,624,982,004 0.8271 4,382,761,461 58 4,310 .053897286
F1 3,494,277,026 1.0015 3,489,043,461 12 831 .028327731
F1 3,647,362,165 1.0033 3,635,365,459 12 257 .007564068
F1 3,748,895,016 0.9145 4,099,393,128 12 73 .041044552
L1 771,873,582 0.9955 775,362,714 8 6,545 .000918215
L1 800,594,078 0.9742 821,796,426 7 1,384 .001563451
L1 854,547,399 0.9271 921,742,422 8 428 .002044480
L1 943,087,408 1.0091 934,582,705 7 100 .002453983
Random Totals: 61,422,795,435   65,491,328,914 652 158,180  
Catg D1 Exception Values: 2,076,736   1,515,198      
Total Test Values (4): 61,424,872,171   65,492,844,112      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 3,274,642,206

Confidence Interval Values (5)

Local Test Value: 61,424,872,171 (Outside Confidence Interval)
State Lower Limit: 62,218,201,906 (State Test Value minus Margin of Error Percent)
State Upper Limit: 68,767,486,318 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 58,956,096,148 (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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