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2011 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 1,359,553,970 1.0681 1,272,871,426 52 17,612 .032580726
A 882,054,721 1.0761 819,677,280 47 8,938 .036158043
A 984,554,030 1.0568 931,637,046 47 7,553 .030629224
A 1,115,199,939 0.9595 1,162,271,953 52 3,028 .010245078
B 408,378,097 0.9558 427,263,127 11 109 .006221540
B 272,731,337 0.9678 281,805,473 8 40 .016908622
B 438,275,227 0.9939 440,965,114 10 38 .016826639
B 311,141,771 0.9147 340,157,178 7 15 .016088871
F1 810,758,315 0.9300 871,783,134 12 919 .062797769
F1 837,249,302 0.8956 934,847,367 10 254 .008313902
F1 811,990,013 0.8979 904,321,208 9 85 .010830305
F1 854,705,703 0.9278 921,217,615 8 29 .003182539
L1 200,164,637 1.0201 196,220,603 10 2,163 .013459504
L1 202,961,924 0.9810 206,892,889 10 227 .002648651
L1 205,661,137 0.9654 213,032,046 8 48 .001526888
L1 194,433,411 0.9263 209,903,283 6 15 .003211879
Random Totals: 9,889,813,534   10,134,866,742 307 41,073  
Catg D1 Exception Values: 14,785   14,920      
Total Test Values (4): 9,889,828,319   10,134,881,662      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 506,744,083

Confidence Interval Values (5)

State Lower Limit: 9,628,137,579 (State Test Value minus Margin of Error Percent)
Local Test Value: 9,889,828,319 (Within Confidence Interval)
State Upper Limit: 10,641,625,745 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 10,657,415,107 (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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