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2008 Confidence Interval Detail
084/Galveston
084-911/Friendswood ISD

Category Summary

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

Stratum
Variance
A 431,303,736 0.9317 462,921,258 16 2,933 .003858087
A 443,784,736 0.9372 473,521,912 15 1,919 .002239647
A 468,062,880 0.9672 483,935,980 15 1,516 .008868345
A 473,577,890 0.9668 489,840,598 15 898 .010306267
F1 134,267,797 1.0118 132,701,914 11 263 .015521123
Random Totals: 1,950,997,039   2,042,921,662 72 7,529  
Catg D1 Exception Values: 208,457   280,126      
Total Test Values (4): 1,951,205,496   2,043,201,788      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 102,160,089

Confidence Interval Values (5)

State Lower Limit: 1,941,041,699 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,951,205,496 (Within Confidence Interval)
State Upper Limit: 2,145,361,877 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,976,441,686 (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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