taxes Property Tax

School and Appraisal Districts Property Value Study 2015 Report

2015 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 1,013,832,305 0.8796 1,152,606,077 158 9,874 .032070450
A 1,161,392,950 0.9097 1,276,676,871 136 5,957 .022863234
A 1,324,595,254 0.9270 1,428,905,344 121 4,061 .021637282
A 1,486,741,818 0.9541 1,558,266,238 112 2,156 .020425182
C1 87,885,531 0.8656 101,531,344 75 4,251 .144317220
C1 90,485,799 0.8076 112,042,842 48 1,830 .140295327
C1 91,857,343 0.8547 107,473,199 43 879 .069520365
C1 105,496,820 0.8300 127,104,602 13 363 .045442647
F1 134,190,560 1.0696 125,458,639 11 673 .019204084
F1 149,474,545 1.1133 134,262,593 10 227 .010944203
F1 137,199,240 0.7871 174,309,795 9 59 .116406324
F1 137,056,000 0.7143 191,874,563 7 19 .141200930
Random Totals: 5,920,208,165   6,490,512,107 743 30,349  
Catg D1 Exception Values: 378,564   336,250      
Total Test Values (4): 5,920,586,729   6,490,848,357      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 324,542,417

Confidence Interval Values (5)

Local Test Value: 5,920,586,729 (Outside Confidence Interval)
State Lower Limit: 6,166,305,940 (State Test Value minus Margin of Error Percent)
State Upper Limit: 6,815,390,774 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 6,336,056,563 (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