taxes Property Tax Assistance

2020 Confidence Interval Detail

Brazoria County
020-901/Alvin ISD

Category Summary

(1)
Category 		(1)
Local
Value 		(1)
Stratum
Ratio 		(1)
State
Value 		(2)
Sample
Size 		(3)
Total
Parcels
Stratum
Variance
A 1,504,336,945 0.9494 1,584,513,319 150 9,549 0.014812970
A 1,848,043,645 1.0050 1,838,849,398 147 7,928 0.004540744
A 1,972,572,278 1.0131 1,947,065,717 150 6,637 0.006055306
A 2,089,295,151 0.9807 2,130,412,105 147 5,105 0.008973353
B 719,680,895 0.9443 762,131,627 9 36 0.004512013
E 492,731,280 0.8074 610,269,111 30 2,882 0.075923845
F1 388,660,919 0.7985 486,738,784 9 612 0.127184822
F1 380,671,848 0.8138 467,770,764 11 154 0.034344221
F1 344,867,605 0.9171 376,041,440 11 43 0.051493499
F1 233,859,100 0.8700 268,803,563 5 6 0.052636339
G1 14,780,060 1.0067 14,681,693 4 6 0.001290824
L1 108,911,725 0.9217 118,163,963 13 901 0.064919774
L1 103,055,530 0.9754 105,654,634 10 130 0.005574590
L1 118,053,710 0.9675 122,019,339 8 42 0.005145028
L1 93,451,350 0.9947 93,949,281 7 12 0.011280886
Random Totals: 10,412,972,041 10,927,064,738 711 34,043
CATG D1 EXCEPTION VALUES: 14,262,926 12,644,918
CATG G1 EXCEPTION VALUES: 150,042,229 150,433,225
CATG J EXCEPTION VALUES: 114,855,570 135,624,268
Total Test Values 10,692,132,766 11,225,767,149

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 561,288,357

Confidence Interval Values(5)

Local Test Value: 10,692,132,766 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 10,664,478,792 (State Test Value minus Margin of Error Percent)
State Upper Limit: 11,787,055,506 (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