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 0.7237 30,204,422 16 277 0.273038720
A 37,445,750 0.7582 49,387,695 19 274 0.082712237
A 63,756,170 0.7967 80,025,317 18 302 0.062138299
A 64,162,466 1.1243 57,068,813 19 146 0.039927029
E 39,317,976 0.9690 40,575,827 21 622 0.039355982
F1 8,664,656 0.9617 9,009,729 15 68 0.027177436
F1 12,409,279 1.0630 11,673,828 15 39 0.005438608
F1 11,985,025 0.9721 12,329,004 7 11 0.019443795
F1 9,000,000 0.7620 11,811,715 2 3 0.051131634
Random Totals: 268,600,262 302,086,350 132 1,742
CATG D1 EXCEPTION VALUES: 11,742,380 17,010,773
Total Test Values 280,342,642 319,097,123

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 15,954,856

Confidence Interval Values(5)

Local Test Value: 280,342,642 OUTSIDE CONFIDENCE INTERVAL
State Lower Limit: 303,142,267 (State Test Value minus Margin of Error Percent)
State Upper Limit: 335,051,979 (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