taxes Property Tax

School and Appraisal Districts Property Value Study 2015 Report

2015 Confidence Interval Detail
220/Tarrant
220-902/Birdville ISD

Category Summary

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

Stratum
Variance
A 1,087,801,132 0.8515 1,277,511,605 99 12,850 .034460035
A 1,091,515,211 0.8884 1,228,630,359 101 8,918 .016732686
A 1,086,729,478 0.9108 1,193,159,286 99 6,318 .017571379
A 1,241,663,684 0.9226 1,345,831,004 100 4,455 .011670897
B 158,203,919 1.0822 146,187,321 14 422 .036298444
B 160,393,768 0.9073 176,781,404 7 18 .031013640
B 182,087,549 1.0055 181,091,545 9 12 .006655086
B 280,626,147 1.1344 247,378,479 4 10 .004770792
F1 378,506,353 0.7907 478,697,803 8 918 .079901046
F1 386,974,342 0.9658 400,677,513 9 286 .007917766
F1 398,407,266 0.9056 439,937,352 9 99 .003511350
F1 375,311,949 0.8728 430,009,107 7 25 .001799783
L1 129,891,495 0.9899 131,216,785 11 627 .006204140
L1 163,201,320 1.0078 161,938,202 9 150 .001690745
L1 210,228,189 1.0543 199,400,729 9 52 .017877037
L1 65,481,805 0.9432 69,425,154 4 4 .019615611
Random Totals: 7,397,023,607   8,107,873,648 499 35,164  
Catg D1 Exception Values: 45,313   28,546      
Total Test Values (4): 7,397,068,920   8,107,902,194      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 405,395,109

Confidence Interval Values (5)

Local Test Value: 7,397,068,920 (Outside Confidence Interval)
State Lower Limit: 7,702,507,085 (State Test Value minus Margin of Error Percent)
State Upper Limit: 8,513,297,303 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,504,612,464 (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