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2008 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 1,880,706,980 0.9326 2,016,627,686 33 15,514 .033036761
A 1,918,349,888 0.9691 1,979,516,962 31 11,864 .002891695
A 2,058,282,117 0.9981 2,062,200,298 31 9,378 .010807695
A 2,171,964,561 0.9957 2,181,344,342 33 5,587 .008314484
B 61,738,175 0.8525 72,420,147 7 59 .002625351
B 84,129,713 0.8122 103,582,508 4 12 .020311674
B 168,142,303 0.9032 186,162,869 4 9 .006822263
F1 269,781,504 0.8569 314,834,291 10 487 .027044388
F1 287,196,694 0.8766 327,625,706 8 164 .007640895
L1 94,425,766 0.9932 95,072,257 8 1,245 .006704829
L1 98,858,346 0.9455 104,556,685 7 213 .007847728
L1 107,758,401 0.9906 108,780,942 6 64 .001267614
L1 86,567,425 0.9827 88,091,406 5 16 .000778625
Random Totals: 9,287,901,873   9,640,816,099 187 44,612  
Catg D1 Exception Values: 931,178   949,656      
Catg B Exception Values: 10,904,103   13,735,267      
Catg F1 Exception Values: 54,602,859   59,003,249      
Total Test Values (4): 9,354,340,013   9,714,504,271      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 485,725,214

Confidence Interval Values (5)

State Lower Limit: 9,228,779,057 (State Test Value minus Margin of Error Percent)
Local Test Value: 9,354,340,013 (Within Confidence Interval)
State Upper Limit: 10,200,229,485 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 9,665,716,441 (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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