taxes Property Tax Assistance

2019 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 1,571,901,944 0.9162 1,715,675,556 99 10768 0.035702549
A 1,615,572,029 0.9619 1,679,563,394 102 6274 0.017054457
A 1,713,889,351 0.9484 1,807,137,654 98 4270 0.010997834
A 1,721,186,982 0.9482 1,815,215,126 100 2155 0.020348545
B 80,332,261 0.9811 81,879,789 19 528 0.013561812
B 113,040,283 0.9247 122,245,358 11 326 0.034015639
B 83,382,350 0.5100 163,494,804 7 19 0.056789747
B 82,818,180 0.5556 149,060,799 4 9 0.023101897
C1 95,720,497 0.8196 116,789,284 86 3874 0.099989343
C1 109,378,522 0.9177 119,187,667 56 1818 0.078157423
C1 100,360,798 0.8158 123,021,326 29 725 0.090064169
C1 118,665,122 0.8798 134,877,383 12 296 0.027584493
F1 167,498,409 0.6384 262,372,195 19 696 0.236757977
F1 163,422,431 0.4257 383,891,076 15 201 0.551045277
F1 164,698,230 0.4267 385,981,322 12 53 0.142979058
F1 159,715,610 0.4091 390,407,260 8 17 0.270790884
Random Totals: 8,061,582,999 9,450,799,993 677 32,029
CATG D1 EXCEPTION VALUES: 163,470 161,040
Total Test Values(1) 8,061,746,469 9,450,961,033

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 472,548,052

Confidence Interval Values(5)

Local Test Value: 8,061,746,469 OUTSIDE CONFIDENCE INTERVAL
State Lower Limit: 8,978,412,981 (State Test Value minus Margin of Error Percent)
State Upper Limit: 9,923,509,085 (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