taxes Property Tax Assistance

2018 Confidence Interval Detail

057/Dallas
057-912/Irving ISD

Category Summary

(1)
Category 		(1)
Local
Value 		(1)
Stratum
Ratio 		(1)
State
Value 		(2)
Sample
Size 		(3)
Total
Parcels
Stratum
Variance
A 1,412,387,680 0.9258 1,525,586,174 150 11233 0.031481284
A 1,412,219,220 0.9605 1,470,295,908 148 8290 0.010970493
A 1,412,599,260 0.9710 1,454,788,115 150 6031 0.006661925
A 1,411,788,120 1.0093 1,398,779,471 146 2643 0.005966774
B 497,159,610 0.8639 575,482,822 16 242 0.009766716
B 533,275,610 0.8357 638,118,476 9 45 0.010529933
B 565,978,920 0.9586 590,422,408 7 21 0.029391515
B 753,414,990 0.9406 800,994,036 5 14 0.007462677
C1 79,117,710 0.8268 95,691,473 9 1428 0.110033933
C1 55,840,410 0.9577 58,306,787 9 146 0.047367379
C1 51,156,720 0.8013 63,842,156 8 35 0.085390304
C1 85,752,630 1.2596 68,079,255 5 14 0.181233685
F1 844,622,850 0.9840 858,356,555 12 886 0.007167434
F1 873,715,590 0.9191 950,620,814 8 175 0.006367871
F1 811,467,730 0.9208 881,263,825 8 40 0.015586120
F1 850,846,450 0.9360 909,023,985 5 12 0.006030730
L1 352,811,330 1.0120 348,627,796 12 1047 0.008843758
L1 376,947,460 1.0207 369,302,890 11 173 0.007052937
L1 405,286,860 0.9850 411,458,741 9 45 0.006305642
L1 311,959,390 1.0029 311,057,324 4 7 0.001748201
Random Totals: 13,098,348,540 13,780,099,011 731 32,527
CATG D1 EXCEPTION VALUES: 99,490 97,613
Total Test Values(1) 13,098,448,030 13,780,196,624

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 689,009,831

Confidence Interval Values(5)

Local Test Value: 13,098,448,030 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 13,091,186,793 (State Test Value minus Margin of Error Percent)
State Upper Limit: 14,469,206,455 (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