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 0.8627 1,177,222,207 17 7,892 0.025603576
A 1,239,519,340 0.9651 1,284,342,907 21 7,212 0.005416647
A 1,359,526,340 0.9971 1,363,480,433 27 6,474 0.008546205
A 1,561,121,640 1.0142 1,539,264,090 32 5,596 0.008242861
B 142,068,492 0.9755 145,636,588 13 1,059 0.003616423
B 116,679,890 0.8955 130,295,801 9 18 0.041589272
B 150,619,960 0.7909 190,441,219 5 10 0.021702374
B 133,378,480 0.9313 143,220,439 4 9 0.006049878
F1 480,349,070 0.9312 515,838,778 12 561 0.036533598
F1 471,491,410 0.7830 602,160,166 9 90 0.101664664
F1 534,843,220 0.9217 580,279,071 11 35 0.006223925
F1 673,952,250 0.9406 716,513,130 5 18 0.001269141
L1 313,262,900 1.0589 295,838,039 11 389 0.019856486
L1 320,110,120 1.0176 314,573,624 10 56 0.000912116
L1 322,077,070 1.0088 319,267,516 7 20 0.001302826
L1 462,174,320 1.0034 460,608,252 5 12 0.000026996
Random Totals: 9,296,764,100 9,778,982,260 198 29,451
CATG D1 EXCEPTION VALUES: 84,599 79,624
Total Test Values 9,296,848,699 9,779,061,884

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 488,953,094

Confidence Interval Values(5)

Local Test Value: 9,296,848,699 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 9,290,108,790 (State Test Value minus Margin of Error Percent)
State Upper Limit: 10,268,014,978 (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