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2007 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 432,370,931 1.0335 418,356,005 34 2,914 .005392255
A 432,120,111 1.0067 429,244,175 23 1,861 .004671850
A 432,330,409 1.0089 428,516,611 33 1,391 .002246916
A 432,070,714 0.9925 435,335,732 31 807 .002337384
F1 30,023,334 0.9000 33,359,260 7 100 .055630222
F1 29,429,807 0.9302 31,638,150 8 44 .003046922
F1 30,472,635 0.9789 31,129,467 7 19 .030141294
F1 28,648,362 1.0043 28,525,701 4 6 .001355949
Random Totals: 1,847,466,303   1,836,105,101 147 7,142  
Catg D1 Exception Values: 208,417   273,473      
Total Test Values (4): 1,847,674,720   1,836,378,574      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 91,818,929

Confidence Interval Values (5)

State Lower Limit: 1,744,559,645 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,847,674,720 (Within Confidence Interval)
State Upper Limit: 1,928,197,503 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,915,729,430 (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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