taxes Property Tax Assistance

2021 Confidence Interval Detail

Galveston County
084-911/Friendswood ISD

Category Summary

(1)
Category 		(1)
Local
Value 		(1)
Stratum
Ratio 		(1)
State
Value 		(2)
Sample
Size 		(3)
Total
Parcels
Stratum
Variance
A 777,841,940 1.0675 728,657,555 71 2,948 0.009874519
A 915,768,441 1.0227 895,441,910 72 2,409 0.006358400
A 1,225,682,554 1.0305 1,189,405,681 75 2,410 0.008995190
A 1,306,665,698 1.0543 1,239,368,015 75 1,561 0.012211802
F1 48,890,780 0.8474 57,695,044 11 117 0.055974427
F1 62,981,488 0.9094 69,256,090 10 68 0.031054058
F1 82,810,459 0.9849 84,080,068 8 44 0.025861672
F1 71,260,940 0.9695 73,502,775 5 13 0.002853757
Random Totals: 4,491,902,300 4,337,407,138 327 9,570
CATG D1 EXCEPTION VALUES: 92,470 84,622
Total Test Values 4,491,994,770 4,337,491,760

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 216,874,588

Confidence Interval Values(5)

Local Test Value: 4,491,994,770 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 4,120,617,172 (State Test Value minus Margin of Error Percent)
State Upper Limit: 4,554,366,348 (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