taxes Property Tax Assistance

2021 Confidence Interval Detail

Galveston County
084-903/High Island ISD

Category Summary

(1)
Category 		(1)
Local
Value 		(1)
Stratum
Ratio 		(1)
State
Value 		(2)
Sample
Size 		(3)
Total
Parcels
Stratum
Variance
A 20,114,072 0.9323 21,574,678 17 199 0.047769582
A 30,579,591 0.9646 31,701,836 18 126 0.022013207
A 30,366,520 1.0184 29,817,871 19 88 0.026543400
A 47,611,204 1.1181 42,582,241 18 87 0.026522235
C1 10,289,121 0.8358 12,310,506 15 739 0.033858622
C1 8,511,862 0.7952 10,704,052 15 361 0.099307571
C1 10,697,062 1.0749 9,951,681 15 195 0.054958288
C1 10,337,306 1.0008 10,329,043 15 63 0.039543811
Random Totals: 168,506,738 168,971,908 132 1,858
CATG D1 EXCEPTION VALUES: 71,725 62,496
Total Test Values 168,578,463 169,034,404

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 8,451,720

Confidence Interval Values(5)

Local Test Value: 168,578,463 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 160,582,684 (State Test Value minus Margin of Error Percent)
State Upper Limit: 177,486,124 (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