taxes Property Tax Assistance

2020 Confidence Interval Detail

Presidio County
189-901/Marfa ISD

Category Summary

(1)
Category 		(1)
Local
Value 		(1)
Stratum
Ratio 		(1)
State
Value 		(2)
Sample
Size 		(3)
Total
Parcels
Stratum
Variance
A 21,858,940 0.7131 30,653,401 17 277 0.248224224
A 37,445,750 0.7520 49,794,880 19 274 0.076701504
A 63,756,170 0.7891 80,796,059 18 302 0.055765834
A 64,162,466 1.1096 57,824,861 19 146 0.045046648
E 39,317,976 0.9690 40,575,827 21 622 0.039355982
F1 8,664,656 0.9213 9,404,815 15 68 0.034046192
F1 12,409,279 1.0295 12,053,695 15 39 0.012248919
F1 11,985,025 0.9721 12,329,004 7 11 0.019443795
F1 9,000,000 0.6495 13,856,000 2 3 0.143056476
Random Totals: 268,600,262 307,288,542 133 1,742
CATG D1 EXCEPTION VALUES: 11,738,721 17,018,824
Total Test Values 280,338,983 324,307,366

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 16,215,368

Confidence Interval Values(5)

Local Test Value: 280,338,983 OUTSIDE CONFIDENCE INTERVAL
State Lower Limit: 308,091,998 (State Test Value minus Margin of Error Percent)
State Upper Limit: 340,522,734 (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