taxes Property Tax Assistance

2019 Confidence Interval Detail

Galveston County
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 1,571,901,944 0.9199 1,708,774,806 98 10768 0.034563926
A 1,615,572,029 0.9619 1,679,563,394 102 6274 0.017054457
A 1,713,889,351 0.9486 1,806,756,642 98 4270 0.010983852
A 1,721,186,982 0.9482 1,815,215,126 100 2155 0.020348545
B 80,332,261 0.9893 81,201,113 19 528 0.010134976
B 113,040,283 0.9291 121,666,433 11 326 0.034447448
B 83,382,350 0.6123 136,178,916 7 19 0.054205427
B 82,818,180 0.6585 125,767,927 4 9 0.009276713
C1 95,720,497 0.8196 116,789,284 86 3874 0.099989343
C1 109,378,522 0.9177 119,187,667 56 1818 0.078157423
C1 100,360,798 0.8158 123,021,326 29 725 0.090064169
C1 118,665,122 0.8798 134,877,383 12 296 0.027584493
F1 167,498,409 0.7130 234,920,630 18 696 0.135896682
F1 163,422,431 0.6568 248,816,125 15 201 0.245780159
F1 164,698,230 0.4625 356,104,281 12 53 0.136744505
F1 159,715,610 0.4419 361,429,305 8 17 0.246971735
Random Totals: 8,061,582,999 9,170,270,358 675 32,029
CATG D1 EXCEPTION VALUES: 351,294 337,199
Total Test Values(1) 8,061,934,293 9,170,607,557

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 458,530,378

Confidence Interval Values(5)

Local Test Value: 8,061,934,293 OUTSIDE CONFIDENCE INTERVAL
State Lower Limit: 8,712,077,179 (State Test Value minus Margin of Error Percent)
State Upper Limit: 9,629,137,935 (State Test Value plus Margin of Error Percent)

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, D2, E, F1, G1, G2, or L1 marked as exception properties
(5) Unstudied categories and sub-categories were not included in the Confidence Interval Values