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2008 Confidence Interval Detail
084/Galveston
084-902/Galveston ISD

Category Summary

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

Stratum
Variance
A 838,568,719 0.9726 862,192,802 12 10,591 .006261450
A 920,152,485 0.9473 971,342,220 14 6,337 .010955596
A 931,250,376 0.9631 966,930,097 23 3,871 .008634920
A 926,398,633 0.9611 963,894,114 13 2,014 .014775772
C 84,230,895 0.9574 87,978,792 7 3,490 .002970981
C 85,763,993 1.0590 80,985,829 8 1,119 .011616720
C 86,198,753 0.9441 91,302,566 7 555 .013309316
C 85,703,820 0.9234 92,813,320 7 184 .024266101
Random Totals: 3,958,267,674   4,117,439,740 91 28,161  
Catg D1 Exception Values: 431,741   336,782      
Total Test Values (4): 3,958,699,415   4,117,776,522      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 205,888,826

Confidence Interval Values (5)

State Lower Limit: 3,911,887,696 (State Test Value minus Margin of Error Percent)
Local Test Value: 3,958,699,415 (Within Confidence Interval)
State Upper Limit: 4,323,665,348 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 5,018,053,476 (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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