taxes Property Tax Assistance

2020 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 1,701,616,244 0.9432 1,804,088,469 99 11,009 0.022608125
A 1,820,253,281 0.9567 1,902,637,484 99 6,802 0.019379163
A 1,820,371,059 0.9947 1,830,070,432 98 4,382 0.009264833
A 1,868,307,655 0.9664 1,933,265,371 97 2,183 0.011004952
B 106,117,028 0.8871 119,622,397 16 616 0.043219657
B 118,255,727 0.9202 128,510,897 15 254 0.079960680
B 44,595,790 0.7999 55,751,706 6 10 0.057150646
B 107,078,550 0.8118 131,906,507 10 16 0.006965058
C1 104,709,287 0.7761 134,917,262 47 3,955 0.277250781
C1 102,473,968 0.8276 123,820,648 49 1,569 0.229105208
C1 104,718,558 0.8536 122,678,723 36 691 0.097486064
C1 96,377,167 0.9329 103,309,215 15 213 0.013378735
F1 171,079,462 0.5637 303,493,812 15 698 0.113012331
F1 207,340,948 0.7863 263,691,909 16 248 0.069650990
F1 170,962,889 0.7318 233,619,690 16 53 0.279044815
F1 289,969,658 0.6681 434,021,341 15 29 0.122045794
Random Totals: 8,834,227,271 9,625,405,863 649 32,728
CATG D1 EXCEPTION VALUES: 300,771 295,961
Total Test Values 8,834,528,042 9,625,701,824

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 481,285,091

Confidence Interval Values(5)

Local Test Value: 8,834,528,042 OUTSIDE CONFIDENCE INTERVAL
State Lower Limit: 9,144,416,733 (State Test Value minus Margin of Error Percent)
State Upper Limit: 10,106,986,915 (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