taxes Property Tax

School and Appraisal Districts Property Value Study 2014 Report

2014 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 854,781,700 0.9451 904,435,192 75 4,161 .031762014
A 861,116,440 0.9603 896,716,068 75 2,955 .007314704
A 1,016,715,330 0.9708 1,047,296,384 75 2,749 .001978891
A 1,147,894,960 0.9497 1,208,692,176 75 2,050 .030368836
F1 573,063,140 0.9134 627,395,599 10 194 .005427549
F1 613,574,590 0.8948 685,711,433 9 82 .041424310
F1 548,346,440 0.9191 596,612,382 7 40 .017425571
F1 753,988,970 0.8906 846,607,871 8 26 .001069504
L1 461,942,360 1.1838 390,219,936 11 341 .022051203
L1 419,633,040 1.0980 382,179,454 9 63 .011074020
L1 595,300,920 0.9903 601,131,899 7 32 .001686634
L1 575,278,860 0.9840 584,632,988 5 13 .006339304
Random Totals: 8,421,636,750   8,771,631,382 366 12,706  
Catg D1 Exception Values: 157,378   156,627      
Total Test Values (4): 8,421,794,128   8,771,788,009      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 438,589,400

Confidence Interval Values (5)

State Lower Limit: 8,333,198,609 (State Test Value minus Margin of Error Percent)
Local Test Value: 8,421,794,128 (Within Confidence Interval)
State Upper Limit: 9,210,377,409 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 8,583,023,387 (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, D3, 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