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 0.7721 20,577,607 13 396 .158851579
A 15,583,950 0.7264 21,453,676 10 218 .042170190
A 15,836,780 0.9096 17,410,708 9 151 .072054234
A 15,652,590 0.8517 18,378,056 11 92 .022295383
E 17,986,350 0.8545 21,048,976 19 587 .063038370
F1 3,806,340 1.0448 3,643,128 11 69 .047461709
F1 4,047,100 0.9230 4,384,724 10 32 .030834796
F1 3,094,250 0.9137 3,386,505 6 10 .104452051
Random Totals: 91,895,330   110,283,380 89 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   163,545,782      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 8,177,289

Confidence Interval Values (5)

Local Test Value: 140,443,117 (Outside Confidence Interval)
State Lower Limit: 155,368,493 (State Test Value minus Margin of Error Percent)
State Upper Limit: 171,723,071 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 172,771,729 (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