taxes Property Tax Assistance

2017 Confidence Interval Detail

253/Zapata
253-901/Zapata County ISD

Category Summary

(1)
Category
(1)
Local
Value
(1)
Stratum
Ratio
(1)
State
Value
(2)
Sample
Size
(3)
Total
Parcels

Stratum
Variance
A 77,178,702 0.9389 82,201,195 16 2,085 .021993643
A 76,594,111 1.0107 75,783,230 15 1,066 .023611825
A 78,879,195 0.9634 81,875,851 17 640 .013512255
A 77,624,879 0.9065 85,631,416 15 365 .009911742
E 68,641,732 0.9422 72,852,613 16 1,881 .019739335
F1 12,932,258 1.0358 12,485,285 9 172 .029118954
F1 13,083,683 1.0478 12,486,813 10 79 .018096094
F1 12,416,928 1.0173 12,205,768 8 43 .017918278
F1 13,321,608 0.7975 16,704,211 7 20 .282669688
G1 92,750,466 1.0201 90,922,915 15 1,188 .034534892
G1 92,963,796 1.0689 86,971,462 15 330 .020164925
G1 92,676,525 1.0812 85,716,357 15 171 .012469907
G1 92,355,401 0.9808 94,163,337 15 62 .026551311
Random Totals: 801,419,284   810,000,453 173 8,102  
Catg J Exception Values: 70,458,846   68,074,831      
Catg D1 Exception Values: 33,565,475   52,085,686      
Total Test Values (4): 905,443,605   930,160,970      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 46,508,048

Confidence Interval Values (5)

State Lower Limit: 883,652,922 (State Test Value minus Margin of Error Percent)
Local Test Value: 905,443,605 (Within Confidence Interval)
State Upper Limit: 976,669,018 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,080,317,658 (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, 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
(6) Includes local value of unstudied property categories and sub-categories