taxes Property Tax

School and Appraisal Districts Property Value Study 2013 Report

2013 Confidence Interval Detail
189/Presidio
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 15,887,970 0.7242 21,938,650 13 396 .139913237
A 15,583,950 0.6807 22,894,006 11 218 .043081115
A 15,836,780 0.6724 23,552,617 11 151 .490319105
A 15,652,590 0.8188 19,116,500 12 92 .022886892
E 17,986,350 0.8342 21,561,196 19 587 .067401017
F1 3,806,340 0.9601 3,964,525 11 69 .080907604
F1 4,047,100 0.8602 4,704,836 10 32 .031852076
F1 3,094,250 0.8898 3,477,467 6 10 .114935181
Random Totals: 91,895,330   121,209,797 93 1,555  
Catg J Exception Values: 29,929,340   31,539,243      
Catg D1 Exception Values: 12,877,570   14,861,091      
Catg F1 Exception Values: 5,740,877   6,862,068      
Total Test Values (4): 140,443,117   174,472,199      

Margin of Error

Margin of Error Percent: 6.4684208
Margin of Error Value: 11,285,596

Confidence Interval Values (5)

Local Test Value: 140,443,117 (Outside Confidence Interval)
State Lower Limit: 163,186,603 (State Test Value minus Margin of Error Percent)
State Upper Limit: 185,757,795 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 181,390,403 (See ISD Summary Worksheet)

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, D3, F1, G1, G2, or L1 marked as exception properties
(5) Unstudied categories and sub-categories were not included in the Confidence Interval Values
(6) Includes local value of unstudied property categories and sub-categories