taxes Property Tax Assistance

2021 Confidence Interval Detail

Tarrant County
220-906/Grapevine-Colleyville ISD

Category Summary

(1)
Category 		(1)
Local
Value 		(1)
Stratum
Ratio 		(1)
State
Value 		(2)
Sample
Size 		(3)
Total
Parcels
Stratum
Variance
A 2,100,808,498 0.9745 2,155,780,911 149 6,957 0.008554289
A 2,506,696,651 0.9661 2,594,655,471 149 6,047 0.010717961
A 2,323,872,781 0.9711 2,393,031,388 151 4,223 0.009054160
A 2,549,638,072 0.9415 2,708,059,556 152 2,856 0.016791577
B 399,314,163 0.9577 416,951,199 9 18 0.016264663
B 392,790,000 0.9834 399,420,378 7 9 0.007291565
B 701,581,285 0.9322 752,608,115 8 11 0.006862963
B 532,829,676 0.9528 559,225,101 5 6 0.002606118
F1 1,037,527,192 0.8611 1,204,885,834 23 577 0.036595738
F1 1,001,519,018 0.8226 1,217,504,277 16 142 0.150894199
F1 770,483,571 1.1502 669,869,215 15 31 0.109584887
L1 557,945,947 1.0304 541,484,809 12 556 0.007636826
L1 519,289,688 0.9893 524,906,184 9 48 0.001086465
L1 431,188,094 1.0106 426,665,440 6 10 0.003072104
L1 528,695,911 1.0003 528,537,350 4 5 0.000000533
Random Totals: 16,354,180,547 17,093,585,228 715 21,496
CATG D1 EXCEPTION VALUES: 64,604 48,607
CATG F1 EXCEPTION VALUES: 519,177,395 501,481,905
CATG L1 EXCEPTION VALUES: 1,064,486,200 1,064,486,200
Total Test Values 17,937,908,746 18,659,601,940

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 932,980,097

Confidence Interval Values(5)

Local Test Value: 17,937,908,746 WITHIN CONFIDENCE INTERVAL
State Lower Limit: 17,726,621,843 (State Test Value minus Margin of Error Percent)
State Upper Limit: 19,592,582,037 (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