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2011 Confidence Interval Detail
101/Harris
101-921/Tomball ISD

Category Summary

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

Stratum
Variance
A 684,089,064 0.9584 713,782,412 40 5,022 .006432993
A 686,178,541 0.9587 715,738,543 40 3,614 .009147736
A 729,919,838 0.9518 766,883,629 47 2,866 .009046454
A 779,553,329 0.9548 816,457,194 46 1,527 .008036639
F1 208,488,646 0.9042 230,578,020 12 378 .021010006
F1 203,275,975 1.1094 183,230,553 9 99 .028705419
F1 189,797,009 0.9771 194,245,225 9 30 .016062895
F1 236,571,284 1.0180 232,388,295 4 10 .009898761
L1 55,504,357 1.0258 54,108,361 10 638 .045869809
L1 56,527,880 1.0015 56,443,215 9 112 .015224958
L1 59,384,215 0.9651 61,531,670 7 22 .000872244
Random Totals: 3,889,290,138   4,025,387,117 233 14,318  
Catg D1 Exception Values: 4,534,978   4,567,527      
Catg L1 Exception Values: 17,999,417   18,989,080      
Total Test Values (4): 3,911,824,533   4,048,943,724      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 202,447,186

Confidence Interval Values (5)

State Lower Limit: 3,846,496,538 (State Test Value minus Margin of Error Percent)
Local Test Value: 3,911,824,533 (Within Confidence Interval)
State Upper Limit: 4,251,390,910 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 5,069,887,459 (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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