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 0.9616 1,475,677,257 125 4,663 .016561795
A 1,419,053,120 0.9667 1,467,935,368 125 3,501 .005399988
A 1,418,977,040 0.9921 1,430,276,222 125 2,828 .011227330
A 1,418,590,360 0.9808 1,446,360,481 117 1,984 .005301290
B 112,967,500 0.9628 117,332,260 15 274 .003724178
B 117,504,910 0.9838 119,439,835 3 6 .003446667
F1 848,408,000 0.8191 1,035,780,735 10 218 .044749949
F1 852,341,870 0.8695 980,266,671 10 86 .012814045
F1 913,548,670 0.8816 1,036,239,417 8 50 .009320763
F1 1,022,000,290 0.9440 1,082,627,426 9 27 .010803631
L1 583,127,270 1.0852 537,345,439 12 370 .043070953
L1 662,537,980 0.9841 673,242,536 10 81 .003988266
L1 468,418,220 1.0016 467,669,948 7 21 .001733102
L1 773,547,720 1.0123 764,148,691 5 14 .000087485
Random Totals: 12,030,034,200   12,634,342,286 581 14,123  
Catg D1 Exception Values: 136,318   126,524      
Catg B Exception Values: 242,576,580   246,794,120      
Total Test Values (4): 12,272,747,098   12,881,262,930      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 644,063,146

Confidence Interval Values (5)

State Lower Limit: 12,237,199,784 (State Test Value minus Margin of Error Percent)
Local Test Value: 12,272,747,098 (Within Confidence Interval)
State Upper Limit: 13,525,326,076 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 12,015,024,938 (See ISD Summary Worksheet)

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
(6) Includes local value of unstudied property categories and sub-categories