taxes Property Tax Assistance

2018 Confidence Interval Detail

057/Dallas
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 1,419,011,250 0.9535 1,488,213,162 125 4663 0.006218354
A 1,419,053,120 0.9667 1,467,935,368 125 3501 0.005399988
A 1,418,977,040 0.9846 1,441,171,075 125 2828 0.003590757
A 1,418,590,360 0.9808 1,446,360,481 117 1984 0.005301290
B 112,967,500 0.9628 117,332,260 15 274 0.003724178
B 117,504,910 0.9838 119,439,835 3 6 0.003446667
F1 848,408,000 0.8191 1,035,780,735 10 218 0.044749949
F1 852,341,870 0.8695 980,266,671 10 86 0.012814045
F1 913,548,670 0.8816 1,036,239,417 8 50 0.009320763
F1 1,022,000,290 0.9440 1,082,627,426 9 27 0.010803631
L1 583,127,270 1.0852 537,345,439 12 370 0.043070953
L1 662,537,980 0.9841 673,242,536 10 81 0.003988266
L1 468,418,220 1.0016 467,669,948 7 21 0.001733102
L1 773,547,720 1.0123 764,148,691 5 14 0.000087485
Random Totals: 12,030,034,200 12,657,773,044 581 14,123
CATG B EXCEPTION VALUES: 242,576,580 246,794,120
CATG D1 EXCEPTION VALUES: 138,338 128,044
Total Test Values(2) 12,272,749,118 12,904,695,208

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 645,234,760

Confidence Interval Values(5)

Local Test Value: 12,272,749,118 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 12,259,460,448 (State Test Value minus Margin of Error Percent)
State Upper Limit: 13,549,929,968 (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