taxes Property Tax Assistance

2017 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 1,673,980,724 0.9579 1,747,552,692 152 6,585 .009888750
A 2,041,222,984 0.9516 2,145,043,069 158 5,764 .009225298
A 2,215,440,918 0.9793 2,262,269,905 139 4,525 .006431797
A 2,106,634,050 0.9935 2,120,416,759 101 2,499 .008643717
B 292,653,202 0.9939 294,449,343 30 632 .008811369
B 239,720,000 0.9871 242,852,801 7 9 .000620673
B 269,475,845 1.0578 254,751,224 5 6 .002162149
B 649,315,193 1.0954 592,765,376 4 10 .001049194
F1 648,765,581 0.9056 716,393,089 13 557 .036277202
F1 673,985,682 0.8640 780,076,021 14 166 .027530007
F1 861,590,921 0.8527 1,010,426,787 11 68 .014524514
L1 465,282,119 1.0527 441,989,284 12 719 .006910472
L1 434,125,595 0.9026 480,972,297 10 67 .072200645
L1 488,073,802 1.0076 484,392,420 6 14 .010528149
L1 451,241,056 0.9038 499,270,918 3 5 .044536182
Random Totals: 13,511,507,672   14,073,621,985 665 21,626  
Catg D1 Exception Values: 81,568   45,876      
Catg F1 Exception Values: 668,384,463   802,150,674      
Catg L1 Exception Values: 833,315,504   875,660,873      
Total Test Values (4): 15,013,289,207   15,751,479,408      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 787,573,970

Confidence Interval Values (5)

State Lower Limit: 14,963,905,438 (State Test Value minus Margin of Error Percent)
Local Test Value: 15,013,289,207 (Within Confidence Interval)
State Upper Limit: 16,539,053,378 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 13,516,152,601 (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, 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
(6) Includes local value of unstudied property categories and sub-categories