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2007 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 827,984,039 1.0047 824,110,719 32 10,044 .050049333
A 828,030,750 0.9531 868,776,361 26 5,496 .029862068
A 828,076,169 1.0047 824,202,418 16 3,324 .001582677
A 827,735,726 0.9823 842,650,642 21 1,739 .005730520
B 61,583,295 0.8568 71,875,928 9 620 .051736382
B 62,287,948 1.0037 62,058,332 8 209 .001798081
B 64,040,579 0.9613 66,618,724 5 23 .003728536
B 57,996,978 0.9115 63,628,061 4 9 .010864919
C 85,689,131 1.0399 82,401,318 7 3,479 .006406445
C 85,661,071 1.0674 80,252,081 7 1,102 .009525985
C 85,729,660 0.9629 89,032,776 9 561 .034717535
C 85,488,620 0.8923 95,807,038 8 184 .037167337
F1 129,048,713 0.9756 132,276,254 9 704 .037123366
F1 129,496,015 0.9094 142,397,201 9 212 .040364888
F1 129,709,395 0.9834 131,898,917 6 65 .057825144
F1 127,564,716 0.9248 137,937,625 5 17 .008641231
Random Totals: 4,416,122,805   4,515,924,395 181 27,788  
Catg D1 Exception Values: 415,856   294,102      
Total Test Values (4): 4,416,538,661   4,516,218,497      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 225,810,925

Confidence Interval Values (5)

State Lower Limit: 4,290,407,572 (State Test Value minus Margin of Error Percent)
Local Test Value: 4,416,538,661 (Within Confidence Interval)
State Upper Limit: 4,742,029,422 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 4,644,788,842 (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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