taxes Property Tax

School and Appraisal Districts Property Value Study 2012 Report

2012 Confidence Interval Detail
020/Brazoria
020-907/Columbia-Brazoria ISD

Category Summary

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

Stratum
Variance
A 132,639,477 1.0268 129,177,519 27 2,049 .023627932
A 139,432,855 0.9920 140,557,314 25 1,340 .023277252
A 141,055,195 0.9638 146,353,180 18 961 .034348343
A 163,643,066 0.9608 170,319,594 16 682 .022290253
C 11,035,249 0.9540 11,567,347 10 1,732 .017636366
C 11,219,500 0.9747 11,510,721 12 1,162 .025163172
C 10,604,963 0.9832 10,786,171 13 730 .030581612
C 12,568,880 1.1479 10,949,456 10 340 .016112173
D3 70,024,147 0.9320 75,133,205 16 3,612 .007545441
F1 14,675,269 0.9724 15,091,803 12 180 .035059242
F1 15,552,948 0.9778 15,906,063 9 74 .011703903
F1 13,699,108 1.0426 13,139,371 7 25 .021060055
F1 15,883,607 1.0233 15,521,946 5 13 .030836302
Random Totals: 752,034,264   766,013,690 180 12,900  
Catg J Exception Values: 27,041,090   28,968,107      
Catg D1 Exception Values: 10,296,061   8,596,735      
Total Test Values (4): 789,371,415   803,578,532      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 40,178,927

Confidence Interval Values (5)

State Lower Limit: 763,399,605 (State Test Value minus Margin of Error Percent)
Local Test Value: 789,371,415 (Within Confidence Interval)
State Upper Limit: 843,757,459 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 796,266,237 (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