taxes Property Tax

School and Appraisal Districts Property Value Study 2014 Report

2014 Confidence Interval Detail
057/Dallas
057-912/Irving ISD

Category Summary

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

Stratum
Variance
A 825,272,270 0.9500 868,707,653 100 10,289 .022485422
A 996,483,440 0.9608 1,037,139,301 100 9,199 .011039146
A 951,378,200 0.9593 991,742,104 100 6,040 .019678644
A 1,024,863,940 0.9533 1,075,069,695 100 2,656 .020277505
B 282,887,570 1.0201 277,313,567 19 321 .004388958
B 307,830,320 0.9191 334,925,819 8 46 .005343838
B 456,486,810 0.9837 464,050,839 6 27 .015644387
B 292,953,000 0.9472 309,283,150 4 7 .025243602
F1 643,335,850 0.8797 731,312,777 10 883 .006624951
F1 695,777,590 0.8967 775,931,293 9 192 .012456798
F1 662,708,020 0.8901 744,532,098 8 49 .003754625
F1 799,900,560 0.8805 908,461,738 6 14 .031012185
L1 280,408,870 1.2165 230,504,620 10 1,105 .011341543
L1 284,639,940 1.1512 247,254,986 9 191 .018198210
L1 283,701,650 1.0928 259,609,855 9 62 .041515412
L1 293,961,330 1.0718 274,268,828 5 11 .012089151
Random Totals: 9,082,589,360   9,530,108,323 503 31,092  
Catg D1 Exception Values: 107,873   108,973      
Total Test Values (4): 9,082,697,233   9,530,217,296      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 476,510,865

Confidence Interval Values (5)

State Lower Limit: 9,053,706,431 (State Test Value minus Margin of Error Percent)
Local Test Value: 9,082,697,233 (Within Confidence Interval)
State Upper Limit: 10,006,728,161 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 9,312,267,580 (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