taxes Property Tax Assistance

2019 Confidence Interval Detail

Tarrant County
061-911/Northwest ISD

Category Summary

(1)
Category 		(1)
Local
Value 		(1)
Stratum
Ratio 		(1)
State
Value 		(2)
Sample
Size 		(3)
Total
Parcels
Stratum
Variance
A 877,663,943 0.9761 899,153,717 101 4364 0.005920727
A 1,300,545,973 1.0122 1,284,870,552 98 5189 0.001794892
A 1,216,453,930 1.0049 1,210,522,370 99 3711 0.003739399
A 1,363,402,115 1.0020 1,360,680,753 97 2757 0.005745564
F1 413,516,237 0.9160 451,436,940 10 150 0.066616866
F1 308,792,690 0.8374 368,751,720 8 25 0.005877981
F1 507,361,190 0.7933 639,557,784 10 22 0.015148797
L1 235,906,004 1.0245 230,264,523 10 34 0.007268682
L1 376,080,603 1.0639 353,492,436 7 12 0.010200779
L1 411,021,224 1.0017 410,323,674 3 5 0.000006524
L1 283,444,906 1.0529 269,203,504 1 2 0.000000000
Random Totals: 7,294,188,815 7,478,257,973 444 16,271
CATG D1 EXCEPTION VALUES: 1,343,505 756,821
CATG F1 EXCEPTION VALUES: 510,524,435 593,240,450
CATG L1 EXCEPTION VALUES: 1,902,011,705 1,900,416,451
Total Test Values(3) 9,708,068,460 9,972,671,695

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 498,633,585

Confidence Interval Values(5)

Local Test Value: 9,708,068,460 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 9,474,038,110 (State Test Value minus Margin of Error Percent)
State Upper Limit: 10,471,305,280 (State Test Value plus Margin of Error Percent)

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