taxes Property Tax Assistance

2016 Confidence Interval Detail

220/Tarrant
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 1,803,509,194 0.9512 1,896,035,738 150 7,195 .013017016
A 1,803,716,267 0.9587 1,881,418,866 144 5,069 .007242350
A 1,803,516,033 0.9754 1,849,001,469 150 3,708 .007505671
A 1,803,100,280 0.9963 1,809,796,527 98 2,141 .018659315
B 367,285,310 0.9595 382,788,233 41 929 .003777759
B 215,263,493 1.0552 204,002,552 5 9 .007741357
B 236,230,587 0.9995 236,348,761 5 6 .011805064
F1 640,884,529 1.0752 596,060,760 10 601 .136748012
F1 636,226,198 0.9675 657,598,137 7 175 .004298509
F1 731,854,354 1.0102 724,464,813 7 63 .005100673
F1 653,900,896 1.0381 629,901,643 3 4 .032563530
L1 483,027,920 1.0063 480,003,895 10 490 .001543580
L1 414,968,836 1.0315 402,296,496 8 37 .034427312
L1 354,301,680 1.0366 341,792,090 5 9 .002764511
L1 442,469,713 0.8621 513,246,390 2 6 .036418973
Random Totals: 12,390,255,290   12,604,756,370 645 20,442  
Catg D1 Exception Values: 68,436   42,639      
Catg B Exception Values: 270,754,880   256,692,184      
Catg L1 Exception Values: 579,233,202   489,832,366      
Total Test Values (4): 13,240,311,808   13,351,323,559      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 667,566,177

Confidence Interval Values (5)

State Lower Limit: 12,683,757,382 (State Test Value minus Margin of Error Percent)
Local Test Value: 13,240,311,808 (Within Confidence Interval)
State Upper Limit: 14,018,889,736 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 12,263,187,882 (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