taxes Property Tax

School and Appraisal Districts Property Value Study 2014 Report

2014 Confidence Interval Detail
057/Dallas
057-910/Grand Prairie ISD

Category Summary

(1)
Category
(1)
Local
Value
(1)
Stratum
Ratio
(1)
State
Value
(2)
Sample
Size
(3)
Total
Parcels

Stratum
Variance
A 614,792,720 0.9911 620,313,510 50 8,863 .057286234
A 668,878,900 0.9875 677,345,722 50 6,509 .006516876
A 688,186,090 0.9919 693,805,918 50 5,143 .002374685
A 831,914,740 1.0018 830,419,984 50 4,503 .010975445
B 68,161,340 0.9132 74,640,101 23 1,041 .085453416
B 49,763,010 0.8322 59,796,936 6 15 .021128304
B 96,579,760 0.8516 113,409,770 4 11 .042604672
F1 220,120,200 0.9123 241,280,500 11 544 .037054142
F1 234,685,500 0.8624 272,130,682 10 134 .016181698
F1 212,141,840 0.8921 237,800,516 8 35 .023935753
F1 301,486,990 0.8999 335,022,769 7 17 .002397606
L1 181,932,250 1.0752 169,207,822 10 414 .029426868
L1 203,077,910 1.1006 184,515,637 9 54 .015803492
L1 169,462,140 1.0582 160,141,882 6 12 .017146284
L1 269,499,370 0.9717 277,348,328 4 9 .006251981
Random Totals: 4,810,682,760   4,947,180,077 298 27,304  
Catg D1 Exception Values: 121,819   126,285      
Catg B Exception Values: 57,215,000   58,727,153      
Total Test Values (4): 4,868,019,579   5,006,033,515      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 250,301,676

Confidence Interval Values (5)

State Lower Limit: 4,755,731,839 (State Test Value minus Margin of Error Percent)
Local Test Value: 4,868,019,579 (Within Confidence Interval)
State Upper Limit: 5,256,335,191 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 5,008,692,624 (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