taxes Property Tax Assistance

2023 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 1,728,177,017 1.0111 1,709,204,843 137 7,780 0.027095830
A 2,528,853,547 1.0382 2,435,805,767 155 8,128 0.008286116
A 3,457,745,150 1.0544 3,279,348,587 153 8,942 0.008847349
A 6,001,906,484 1.0243 5,859,520,144 150 10,983 0.010861318
B 1,064,270,199 1.0043 1,059,713,431 9 39 0.004051900
C1 53,053,736 0.6655 79,720,114 10 1,463 0.514635147
C1 86,677,406 0.8538 101,519,567 24 810 0.231018788
C1 98,184,324 1.0838 90,592,659 10 357 0.048316367
C1 121,138,122 0.9408 128,760,759 9 110 0.089181312
E 789,206,053 1.1038 714,990,082 25 2,888 0.071033665
F1 469,593,202 1.0085 465,635,302 14 664 0.014253518
F1 683,171,404 1.0838 630,348,223 12 285 0.017985331
F1 649,329,379 1.0061 645,392,485 13 95 0.009694210
F1 591,959,032 1.0912 542,484,450 8 23 0.047984349
L1 123,743,150 1.0070 122,882,969 10 1,050 0.005330914
L1 108,131,300 0.9024 119,826,352 10 150 0.016948636
L1 123,217,530 0.9187 134,121,618 10 48 0.012311289
L1 130,851,220 0.9735 134,413,169 7 16 0.006835206
Random Totals: 18,809,208,255 18,254,280,521 766 43,831
CATG D1 EXCEPTION VALUES: 15,544,469 14,424,582
CATG J EXCEPTION VALUES: 102,881,730 107,062,754
Total Test Values 18,927,634,454 18,375,767,857

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 918,788,393

Confidence Interval Values(5)

Local Test Value: 18,927,634,454 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 17,456,979,464 (State Test Value minus Margin of Error Percent)
State Upper Limit: 19,294,556,250 (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