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2008 Confidence Interval Detail
084/Galveston
084-906/Texas City ISD

Category Summary

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

Stratum
Variance
A 157,343,799 0.9734 161,643,517 17 2,867 .039748363
A 164,150,870 1.0139 161,900,454 19 1,989 .023826108
A 174,182,170 0.9863 176,601,612 13 1,552 .031398844
A 175,761,510 0.9664 181,872,423 10 978 .020118499
F1 76,896,890 1.0100 76,135,535 10 616 .011911225
L1 15,133,390 0.8233 18,381,380 10 252 .333770288
L1 14,723,014 0.9672 15,222,306 6 43 .009194374
L1 24,169,495 1.0312 23,438,222 6 19 .010169734
L1 15,855,664 1.0268 15,441,823 3 5 .002129037
Random Totals: 818,216,802   830,637,272 94 8,321  
Catg J Exception Values: 23,195,516   22,959,077      
Catg D1 Exception Values: 14,808   11,311      
Total Test Values (4): 841,427,126   853,607,660      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 42,680,383

Confidence Interval Values (5)

State Lower Limit: 810,927,277 (State Test Value minus Margin of Error Percent)
Local Test Value: 841,427,126 (Within Confidence Interval)
State Upper Limit: 896,288,043 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 5,177,534,205 (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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