taxes Property Tax Assistance

2020 Confidence Interval Detail

Dallas County
057-922/Coppell ISD

Category Summary

(1)
Category 		(1)
Local
Value 		(1)
Stratum
Ratio 		(1)
State
Value 		(2)
Sample
Size 		(3)
Total
Parcels
Stratum
Variance
A 1,444,972,420 0.9884 1,461,930,817 101 4,558 0.003797397
A 1,532,883,101 0.9912 1,546,492,233 98 3,678 0.002181851
A 1,644,602,260 0.9877 1,665,082,778 98 3,208 0.002752517
A 1,625,662,790 1.0002 1,625,337,722 94 2,255 0.001523215
B 124,557,590 0.9199 135,403,403 13 152 0.007532890
B 91,534,450 1.0034 91,224,287 3 4 0.005606059
B 172,035,330 0.9894 173,877,220 5 8 0.013410808
B 160,889,910 0.8676 185,436,642 3 4 0.016802818
F1 1,016,576,050 0.8392 1,211,363,263 11 244 0.023416608
F1 1,003,824,970 0.8138 1,233,503,281 10 93 0.016526944
F1 959,970,380 0.8766 1,095,106,525 9 47 0.009283898
F1 1,198,035,410 0.9227 1,298,401,875 9 30 0.006737411
L1 679,595,880 1.0174 667,973,147 10 342 0.002362161
L1 772,417,600 0.9949 776,377,123 10 71 0.001216360
L1 690,233,660 1.0124 681,779,593 7 24 0.000261493
L1 804,277,750 1.0563 761,410,347 4 8 0.005077504
Random Totals: 13,922,069,551 14,610,700,256 485 14,726
CATG D1 EXCEPTION VALUES: 130,144 122,689
Total Test Values 13,922,199,695 14,610,822,945

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 730,541,147

Confidence Interval Values(5)

Local Test Value: 13,922,199,695 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 13,880,281,798 (State Test Value minus Margin of Error Percent)
State Upper Limit: 15,341,364,092 (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