taxes Property Tax Assistance

2017 Confidence Interval Detail

084/Galveston
084-906/Texas City ISD

Category Summary

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

Stratum
Variance
A 431,154,252 0.9344 461,423,643 59 6,677 .014467025
A 491,268,191 0.9700 506,462,053 93 4,587 .005856817
A 540,832,432 0.9643 560,854,954 103 3,239 .009386317
A 587,931,333 0.9488 619,657,813 66 1,685 .010758518
F1 60,975,057 0.9040 67,450,284 10 533 .044144256
F1 62,006,290 0.9811 63,200,785 9 158 .026928213
F1 57,542,203 1.0441 55,111,774 8 54 .018454357
F1 63,612,495 0.9810 64,844,541 6 15 .012316657
L1 47,366,987 1.0658 44,442,660 11 468 .012430427
L1 37,261,173 0.9964 37,395,798 9 58 .008004588
L1 48,899,590 0.9772 50,040,514 7 20 .007944936
L1 50,229,510 1.0640 47,208,186 4 7 .045156026
Random Totals: 2,479,079,513   2,578,093,005 385 17,501  
Catg J Exception Values: 24,997,697   28,163,938      
Catg D1 Exception Values: 102,641   81,242      
Total Test Values (4): 2,504,179,851   2,606,338,185      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 130,316,909

Confidence Interval Values (5)

State Lower Limit: 2,476,021,276 (State Test Value minus Margin of Error Percent)
Local Test Value: 2,504,179,851 (Within Confidence Interval)
State Upper Limit: 2,736,655,094 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 4,810,736,672 (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