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2009 Confidence Interval Detail
101/Harris
101-913/Humble ISD

Category Summary

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

Stratum
Variance
A 2,051,867,153 0.9991 2,053,715,497 51 16,648 .027967939
A 1,950,875,520 0.9624 2,027,094,264 55 11,733 .009338607
A 1,942,150,238 0.9879 1,965,938,089 55 8,525 .009938674
A 2,068,305,041 0.9923 2,084,354,571 54 5,108 .014276655
B 94,394,167 0.9963 94,744,722 7 46 .002518664
B 87,878,136 0.9696 90,633,391 5 9 .009491419
B 156,525,333 0.9974 156,933,360 3 10 .000062822
B 43,399,540 0.9720 44,649,733 3 2 .007203234
C 52,447,319 1.0580 49,572,135 7 2,213 .036522569
C 62,917,879 1.0503 59,904,674 7 1,449 .064374734
C 50,317,746 0.8807 57,133,809 9 386 .024175165
C 65,652,322 0.9220 71,206,423 6 68 .009873148
F1 308,921,022 0.8641 357,506,101 7 498 .027773318
F1 300,181,695 0.8639 347,472,734 7 155 .042987783
F1 305,326,309 0.9780 312,194,590 6 68 .004706547
F1 286,188,980 0.9726 294,251,470 5 21 .009160953
L1 107,840,796 0.9840 109,594,305 8 1,262 .004886316
L1 102,542,971 0.9723 105,464,333 8 204 .005458324
L1 88,605,427 0.9676 91,572,372 7 54 .026089515
L1 107,477,818 0.9468 113,516,918 6 23 .006710448
Random Totals: 10,233,815,412   10,487,453,491 316 48,482  
Catg D1 Exception Values: 12,311,786   12,235,916      
Total Test Values (4): 10,246,127,198   10,499,689,407      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 524,984,470

Confidence Interval Values (5)

State Lower Limit: 9,974,704,937 (State Test Value minus Margin of Error Percent)
Local Test Value: 10,246,127,198 (Within Confidence Interval)
State Upper Limit: 11,024,673,877 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 9,990,590,644 (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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