taxes Property Tax Assistance

2021 Confidence Interval Detail

Galveston County
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 380,278,582 0.9570 397,365,289 63 3,951 0.036314525
A 930,606,845 1.0377 896,797,576 71 6,606 0.013797800
A 1,105,315,889 1.0430 1,059,746,778 73 5,240 0.021688647
A 990,697,361 1.0319 960,071,093 73 2,213 0.016193469
B 63,345,507 0.9638 65,724,743 10 266 0.140486753
B 43,209,390 1.0770 40,120,139 6 11 0.023568715
B 47,414,871 0.9174 51,683,967 5 7 0.074757336
B 46,124,780 0.9854 46,809,836 3 8 0.015848905
F1 99,161,153 0.8109 122,285,304 16 607 0.128297729
F1 108,707,618 0.8542 127,262,489 17 216 0.232463234
F1 127,356,095 1.0666 119,403,802 15 105 0.023006777
F1 175,824,370 1.0911 161,144,139 9 35 0.153153641
L1 44,529,790 0.9778 45,540,796 10 442 0.009289289
L1 48,637,290 0.9834 49,458,298 10 62 0.020489460
L1 54,784,160 0.9553 57,347,598 7 17 0.004325276
Random Totals: 4,265,993,701 4,200,761,847 388 19,786
CATG D1 EXCEPTION VALUES: 102,601 90,054
CATG L1 EXCEPTION VALUES: 24,844,190 23,530,222
Total Test Values 4,290,940,492 4,224,382,123

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 211,219,106

Confidence Interval Values(5)

Local Test Value: 4,290,940,492 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 4,013,163,017 (State Test Value minus Margin of Error Percent)
State Upper Limit: 4,435,601,229 (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