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2009 Confidence Interval Detail
101/Harris
101-903/Alief ISD

Category Summary

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

Stratum
Variance
A 1,727,737,910 1.1035 1,565,689,089 46 19,730 .036780201
A 815,645,428 1.1030 739,479,083 50 7,359 .035982618
A 993,561,584 1.0677 930,562,503 52 7,142 .041448292
A 1,199,124,853 0.9639 1,244,034,498 58 3,268 .014028083
B 411,933,321 0.9560 430,892,595 8 97 .002947486
B 398,508,585 0.9285 429,196,107 9 51 .001322398
B 382,529,370 1.0155 376,690,665 6 32 .000781442
B 429,444,760 0.9600 447,338,292 6 20 .013469492
F1 989,870,689 0.9504 1,041,530,607 16 857 .028553369
F1 852,985,416 0.9616 887,048,062 17 198 .003273968
F1 946,280,531 0.9816 964,018,471 14 76 .000774915
F1 789,433,642 0.9813 804,477,369 10 20 .000438138
L1 212,016,127 0.9437 224,664,753 8 2,358 .004814599
L1 209,497,684 0.9520 220,060,592 7 293 .009241963
L1 177,025,896 0.9818 180,307,492 7 60 .000548363
L1 281,711,942 0.9737 289,321,087 6 28 .003215891
Random Totals: 10,817,307,738   10,775,311,265 320 41,589  
Catg D1 Exception Values: 14,383   9,798      
Total Test Values (4): 10,817,322,121   10,775,321,063      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 538,766,053

Confidence Interval Values (5)

State Lower Limit: 10,236,555,010 (State Test Value minus Margin of Error Percent)
Local Test Value: 10,817,322,121 (Within Confidence Interval)
State Upper Limit: 11,314,087,116 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 11,260,302,537 (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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