taxes Property Tax

School and Appraisal Districts Property Value Study 2014 Report

2014 Confidence Interval Detail
057/Dallas
057-907/Duncanville ISD

Category Summary

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

Stratum
Variance
A 458,283,420 0.9759 469,600,799 50 6,139 .010410778
A 482,931,990 0.9783 493,644,066 50 4,538 .004344309
A 515,461,070 0.9869 522,303,242 50 3,627 .003578280
A 587,118,970 1.0135 579,298,441 50 2,754 .011956267
B 51,318,760 0.7741 66,294,742 9 197 .024428014
B 29,083,920 0.8670 33,545,467 6 6 .019660320
B 61,383,210 0.8102 75,763,034 5 9 .045331589
F1 146,414,070 0.8184 178,902,823 11 406 .016304965
F1 146,092,340 0.8717 167,594,746 11 140 .039569428
F1 158,334,360 0.8936 177,187,064 10 63 .016268818
F1 143,188,160 0.9158 156,353,090 7 20 .003340828
L1 69,742,250 1.0547 66,125,201 11 361 .004168825
L1 72,358,920 1.0239 70,669,909 9 64 .004508499
L1 55,496,940 1.0324 53,755,269 6 15 .004605781
L1 82,454,160 1.0053 82,019,457 4 8 .000597013
Random Totals: 3,059,662,540   3,193,057,350 289 18,347  
Catg D1 Exception Values: 84,512   85,861      
Catg B Exception Values: 43,483,780   40,701,279      
Total Test Values (4): 3,103,230,832   3,233,844,490      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 161,692,225

Confidence Interval Values (5)

State Lower Limit: 3,072,152,265 (State Test Value minus Margin of Error Percent)
Local Test Value: 3,103,230,832 (Within Confidence Interval)
State Upper Limit: 3,395,536,715 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,473,554,307 (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