taxes Property Tax Assistance

2020 Confidence Interval Detail

Dallas County
057-910/Grand Prairie ISD

Category Summary

(1)
Category 		(1)
Local
Value 		(1)
Stratum
Ratio 		(1)
State
Value 		(2)
Sample
Size 		(3)
Total
Parcels
Stratum
Variance
A 1,015,589,598 0.8460 1,200,460,518 20 7,892 0.021090825
A 1,239,519,340 0.9398 1,318,918,217 23 7,212 0.008116091
A 1,359,526,340 0.9775 1,390,819,785 28 6,474 0.010437627
A 1,561,121,640 0.9953 1,568,493,560 34 5,596 0.009386185
B 142,068,492 0.9531 149,059,377 13 1,059 0.007642617
B 116,679,890 0.8835 132,065,523 9 18 0.043742326
B 150,619,960 0.7729 194,876,388 5 10 0.022635803
B 133,378,480 0.9187 145,187,990 4 9 0.006542313
F1 480,349,070 0.9312 515,838,778 12 561 0.036533598
F1 471,491,410 0.7694 612,804,016 9 90 0.099095740
F1 534,843,220 0.8647 618,530,380 11 35 0.009894064
F1 673,952,250 0.8911 756,314,948 5 18 0.001064048
L1 313,262,900 1.0589 295,838,039 11 389 0.019856486
L1 320,110,120 1.0176 314,573,624 10 56 0.000912644
L1 322,077,070 1.0073 319,742,946 7 20 0.001449732
L1 462,174,320 1.0034 460,608,252 5 12 0.000026996
Random Totals: 9,296,764,100 9,994,132,341 206 29,451
CATG D1 EXCEPTION VALUES: 84,599 79,033
Total Test Values 9,296,848,699 9,994,211,374

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 499,710,569

Confidence Interval Values(5)

Local Test Value: 9,296,848,699 OUTSIDE CONFIDENCE INTERVAL
State Lower Limit: 9,494,500,805 (State Test Value minus Margin of Error Percent)
State Upper Limit: 10,493,921,943 (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