taxes Property Tax Assistance

2018 Confidence Interval Detail

057/Dallas
057-907/Duncanville ISD

Category Summary

(1)
Category 		(1)
Local
Value 		(1)
Stratum
Ratio 		(1)
State
Value 		(2)
Sample
Size 		(3)
Total
Parcels
Stratum
Variance
A 764,744,900 0.9403 813,298,841 73 6008 0.017323246
A 764,704,160 0.9687 789,412,780 75 4714 0.012113252
A 764,640,140 0.9652 792,209,014 75 3787 0.006182474
A 764,510,090 0.9754 783,791,357 75 2652 0.003786231
B 84,125,780 0.8997 93,504,257 11 276 0.025642350
B 80,889,750 0.8506 95,097,284 5 10 0.008047590
B 64,995,470 0.8135 79,896,091 3 6 0.017624884
F1 183,839,800 0.8857 207,564,412 10 413 0.034199588
F1 190,241,200 0.8931 213,012,205 9 140 0.020014312
F1 207,485,620 0.8995 230,667,727 10 57 0.009609991
F1 163,457,420 0.9695 168,599,711 6 14 0.023382086
L1 100,803,380 1.0716 94,068,104 11 335 0.007441960
L1 84,593,960 1.0469 80,804,241 9 45 0.015215803
L1 82,796,770 1.0312 80,291,670 6 11 0.009989705
L1 150,215,280 1.0033 149,721,200 2 7 0.000151463
Random Totals: 4,452,043,720 4,671,938,894 380 18,475
CATG B EXCEPTION VALUES: 114,452,110 133,222,262
CATG D1 EXCEPTION VALUES: 86,086 78,267
Total Test Values(2) 4,566,581,916 4,805,239,423

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 240,261,971

Confidence Interval Values(5)

Local Test Value: 4,566,581,916 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 4,564,977,452 (State Test Value minus Margin of Error Percent)
State Upper Limit: 5,045,501,394 (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