taxes Property Tax

School and Appraisal Districts Property Value Study 2015 Report

2015 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 168,228,616 0.9204 182,777,723 54 3,221 .037788975
A 173,775,118 0.9365 185,558,054 48 2,081 .016947162
A 184,268,015 0.9484 194,293,563 63 1,569 .012628646
A 200,674,659 0.9975 201,177,603 44 966 .012208708
F1 18,546,520 0.8284 22,388,363 10 252 .279426454
F1 17,510,400 0.8624 20,304,267 9 93 .060446941
F1 20,856,840 1.0481 19,899,666 8 49 .004930377
F1 17,851,770 0.8012 22,281,291 6 14 .057769940
L1 16,675,497 0.9781 17,048,867 10 235 .005752343
L1 16,548,252 1.0876 15,215,384 8 36 .015403456
L1 14,782,618 1.0311 14,336,745 5 9 .004245372
L1 27,729,314 1.0147 27,327,598 3 8 .010193354
Random Totals: 877,447,619   922,609,124 268 8,533  
Catg J Exception Values: 7,311,241   7,991,174      
Catg D1 Exception Values: 14,381   12,434      
Total Test Values (4): 884,773,241   930,612,732      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 46,530,636

Confidence Interval Values (5)

State Lower Limit: 884,082,096 (State Test Value minus Margin of Error Percent)
Local Test Value: 884,773,241 (Within Confidence Interval)
State Upper Limit: 977,143,368 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,925,910,472 (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