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2008 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 502,642,239 0.9452 531,784,002 30 3,912 .034288555
A 577,488,243 0.9665 597,504,649 27 3,230 .008150440
A 635,391,228 0.9700 655,042,503 29 2,737 .004951613
A 667,642,661 0.9819 679,949,752 30 1,593 .013948477
F1 228,814,306 0.8151 280,719,306 10 363 .014700073
F1 287,164,694 0.9732 295,072,641 9 83 .005457195
F1 529,326,682 0.9574 552,879,342 6 17 .006580578
L1 47,399,968 0.9436 50,233,116 7 702 .013151202
L1 50,192,872 1.0379 48,360,027 7 144 .011029264
L1 46,626,619 0.8699 53,599,976 6 35 .092789054
L1 59,133,977 0.9719 60,843,685 4 11 .002690548
Random Totals: 3,631,823,489   3,805,988,999 165 12,827  
Catg D1 Exception Values: 8,015,896   7,987,812      
Total Test Values (4): 3,639,839,385   3,813,976,811      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 190,698,841

Confidence Interval Values (5)

State Lower Limit: 3,623,277,970 (State Test Value minus Margin of Error Percent)
Local Test Value: 3,639,839,385 (Within Confidence Interval)
State Upper Limit: 4,004,675,652 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 4,403,309,943 (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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