taxes Property Tax Assistance

2019 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 502,056,496 0.8721 575,686,843 50 6920 0.061512237
A 575,276,392 0.9083 633,355,050 50 4907 0.026868895
A 596,724,702 0.9258 644,550,337 51 3186 0.017566633
A 612,655,067 0.9430 649,687,240 60 1573 0.032254684
F1 61,632,017 0.3766 163,653,789 11 524 0.357981644
F1 63,055,180 0.3359 187,720,095 9 158 0.122984650
F1 64,521,643 0.3554 181,546,548 10 59 0.286373911
F1 64,177,145 0.4701 136,518,071 6 14 0.135669751
L1 47,903,110 0.9945 48,168,034 10 416 0.020468857
L1 45,057,150 0.9304 48,427,719 12 50 0.113010713
L1 44,492,270 1.0615 41,914,527 6 13 0.021634347
L1 34,065,320 1.0709 31,809,992 3 5 0.019111093
Random Totals: 2,711,616,492 3,343,038,245 278 17,825
CATG D1 EXCEPTION VALUES: 33,240 29,986
CATG J EXCEPTION VALUES: 29,731,366 35,632,296
Total Test Values(2) 2,741,381,098 3,378,700,527

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 168,935,026

Confidence Interval Values(5)

Local Test Value: 2,741,381,098 OUTSIDE CONFIDENCE INTERVAL
State Lower Limit: 3,209,765,501 (State Test Value minus Margin of Error Percent)
State Upper Limit: 3,547,635,553 (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