taxes Property Tax Assistance

2019 Confidence Interval Detail

Brewster County
022-902/Marathon ISD

Category Summary

(1)
Category 		(1)
Local
Value 		(1)
Stratum
Ratio 		(1)
State
Value 		(2)
Sample
Size 		(3)
Total
Parcels
Stratum
Variance
A 6,570,354 1.0321 6,366,005 17 126 0.062635598
A 6,473,157 0.9541 6,784,569 18 70 0.044299755
A 6,385,769 1.0437 6,118,395 16 48 0.027049560
A 6,007,772 0.9999 6,008,373 14 27 0.036399990
E 14,790,193 0.6589 22,446,795 15 517 2.125252834
F1 803,653 0.9678 830,392 2 14 0.002244449
F1 848,539 1.0658 796,152 2 7 0.016295498
F1 1,189,801 0.8515 1,397,300 1 4 0.000000000
Random Totals: 43,069,238 50,747,981 85 813
CATG D1 EXCEPTION VALUES: 12,123,507 15,011,428
CATG F1 EXCEPTION VALUES: 3,479,976 3,615,107
CATG J EXCEPTION VALUES: 35,105,950 36,066,951
Total Test Values(3) 93,778,671 105,441,467

Margin of Error

Margin of Error Percent: 15.7476916
Margin of Error Value: 16,604,597

Confidence Interval Values(5)

Local Test Value: 93,778,671 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 88,836,870 (State Test Value minus Margin of Error Percent)
State Upper Limit: 122,046,064 (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