taxes Property Tax

School and Appraisal Districts Property Value Study 2015 Report

2015 Confidence Interval Detail
084/Galveston
084-903/High Island ISD

Category Summary

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

Stratum
Variance
A 10,816,691 0.7503 14,416,488 7 172 .018367440
A 10,271,950 0.8757 11,729,987 7 69 .051033248
A 12,115,030 1.1296 10,725,062 7 53 .008565784
A 9,942,024 1.0117 9,827,048 8 27 .044601931
C1 3,125,813 1.0076 3,102,236 7 994 .001214820
C1 3,246,721 0.9963 3,258,778 7 302 .001674537
C1 3,020,020 1.0946 2,759,017 7 103 .014134402
C1 2,705,750 1.0787 2,508,343 7 36 .022369641
G1 5,916,774 1.1074 5,342,942 7 23 .055006538
Random Totals: 61,160,773   63,669,901 64 1,779  
Catg D1 Exception Values: 173,979   163,266      
Catg G1 Exception Values: 8,299,170   8,128,422      
Total Test Values (4): 69,633,922   71,961,589      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 3,598,079

Confidence Interval Values (5)

State Lower Limit: 68,363,510 (State Test Value minus Margin of Error Percent)
Local Test Value: 69,633,922 (Within Confidence Interval)
State Upper Limit: 75,559,668 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 80,674,261 (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