taxes Property Tax Assistance

2020 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 528,100,289 0.8054 655,699,390 23 6,517 0.049148945
A 732,950,545 0.9023 812,313,582 35 5,805 0.021275256
A 672,344,769 0.9438 712,380,556 31 3,371 0.020737322
A 728,831,897 0.9433 772,640,620 27 1,781 0.015880662
F1 71,133,844 0.5327 133,534,530 18 574 0.155645107
F1 78,658,877 0.5096 154,354,154 16 184 0.184467340
F1 82,521,442 0.7609 108,452,414 15 67 0.147959419
F1 74,036,170 0.7461 99,230,894 12 16 0.061326237
L1 45,059,930 0.9457 47,647,171 12 462 0.045853055
L1 49,043,410 0.9967 49,205,789 11 70 0.038313270
L1 39,567,130 0.9142 43,280,606 7 14 0.004677246
L1 43,301,140 1.1085 39,062,294 6 9 0.060793018
Random Totals: 3,145,549,443 3,627,802,000 213 18,870
CATG D1 EXCEPTION VALUES: 106,571 103,772
CATG J EXCEPTION VALUES: 110,478,690 142,998,517
Total Test Values 3,256,134,704 3,770,904,289

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 188,545,214

Confidence Interval Values(5)

Local Test Value: 3,256,134,704 OUTSIDE CONFIDENCE INTERVAL
State Lower Limit: 3,582,359,075 (State Test Value minus Margin of Error Percent)
State Upper Limit: 3,959,449,503 (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