taxes Property Tax

School and Appraisal Districts Property Value Study 2015 Report

2015 Confidence Interval Detail
084/Galveston
084-911/Friendswood ISD

Category Summary

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

Stratum
Variance
A 539,111,009 0.9184 587,011,116 107 3,210 .044519143
A 389,774,929 0.9308 418,752,610 49 1,488 .023122945
A 819,902,668 0.9575 856,295,215 111 2,333 .022070176
A 864,186,098 0.9629 897,482,706 107 1,492 .016452936
F1 35,659,625 1.0356 34,433,782 9 112 .004058656
F1 37,472,670 1.0635 35,235,233 8 50 .010360026
F1 34,367,760 1.0324 33,289,190 7 24 .002659539
F1 42,063,250 0.9902 42,479,550 4 10 .003098870
Random Totals: 2,762,538,009   2,904,979,402 402 8,719  
Catg D1 Exception Values: 74,445   64,408      
Total Test Values (4): 2,762,612,454   2,905,043,810      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 145,252,190

Confidence Interval Values (5)

State Lower Limit: 2,759,791,620 (State Test Value minus Margin of Error Percent)
Local Test Value: 2,762,612,454 (Within Confidence Interval)
State Upper Limit: 3,050,296,000 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,518,930,580 (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