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2011 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 4,317,509 1.0366 4,165,068 10 121 .009534186
A 5,212,410 0.8001 6,514,698 10 65 .109676226
A 7,820,240 1.0569 7,399,224 10 51 .027300220
A 6,465,194 0.9957 6,493,114 6 21 .053793217
C 3,319,586 0.4597 7,221,201 11 1,138 1.178167632
C 2,831,862 0.7915 3,577,842 12 333 .713838313
C 2,772,570 1.0651 2,603,108 10 122 .029159604
C 2,359,110 1.0473 2,252,564 10 40 .017979105
D3 3,954,330 1.1221 3,524,044 15 382 .005824901
G1 16,425,030 0.9897 16,595,968 10 32 .030308846
Random Totals: 55,477,841   60,346,831 104 2,305  
Catg J Exception Values: 2,547,849   2,722,674      
Catg D1 Exception Values: 366,710   440,237      
Total Test Values (4): 58,392,400   63,509,742      

Margin of Error

Margin of Error Percent: 8.6544219
Margin of Error Value: 5,496,401

Confidence Interval Values (5)

State Lower Limit: 58,013,341 (State Test Value minus Margin of Error Percent)
Local Test Value: 58,392,400 (Within Confidence Interval)
State Upper Limit: 69,006,143 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 63,528,165 (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

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