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2008 Confidence Interval Detail
084/Galveston
084-903/High Island ISD

Category Summary

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

Stratum
Variance
A 21,113,604 0.7232 29,194,696 17 496 .076714558
A 20,796,200 1.0115 20,559,763 17 218 .049666767
A 23,272,650 1.3062 17,817,065 16 131 .083785666
A 22,675,970 1.3956 16,248,187 16 63 .029685165
C 2,107,700 0.8650 2,436,647 7 774 .002941129
C 2,317,699 0.9328 2,484,669 7 276 .037750539
C 2,650,110 1.0571 2,506,962 7 91 .008387431
C 2,208,874 0.9543 2,314,654 6 28 .024853248
G1 12,692,970 0.9933 12,778,587 15 28 .052987060
Random Totals: 109,835,777   106,341,230 108 2,105  
Catg D1 Exception Values: 330,508   252,838      
Catg G1 Exception Values: 6,956,620   6,660,653      
Total Test Values (4): 117,122,905   113,254,721      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 5,662,736

Confidence Interval Values (5)

State Lower Limit: 107,591,985 (State Test Value minus Margin of Error Percent)
Local Test Value: 117,122,905 (Within Confidence Interval)
State Upper Limit: 118,917,457 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 130,907,732 (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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