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2011 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 831,810,303 0.9480 877,437,028 41 9,650 .013252599
A 883,821,762 0.9110 970,166,588 28 5,556 .025819489
A 859,756,038 0.9861 871,875,102 29 3,260 .052099150
A 933,293,268 0.9977 935,444,791 25 1,808 .008125717
C 78,717,058 0.5904 133,328,350 32 4,463 .381420647
C 78,034,822 0.9215 84,682,390 13 1,385 .319023284
C 78,644,859 0.9887 79,543,703 15 677 .047628066
C 81,062,050 0.9667 83,854,402 10 229 .025432440
F1 117,828,035 1.0540 111,791,305 10 653 .007417140
F1 118,635,669 1.0476 113,245,198 13 209 .007136630
F1 110,796,710 0.9611 115,281,147 9 63 .009258527
F1 127,588,350 0.9411 135,573,637 7 23 .009654051
Random Totals: 4,299,988,924   4,512,223,641 232 27,976  
Catg D1 Exception Values: 411,680   527,392      
Total Test Values (4): 4,300,400,604   4,512,751,033      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 225,637,552

Confidence Interval Values (5)

State Lower Limit: 4,287,113,481 (State Test Value minus Margin of Error Percent)
Local Test Value: 4,300,400,604 (Within Confidence Interval)
State Upper Limit: 4,738,388,585 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 4,849,553,699 (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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