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2007 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 20,599,787 0.7226 28,507,870 25 485 .090655651
A 20,626,254 1.0031 20,562,510 23 216 .081736092
A 20,552,183 1.2533 16,398,454 21 114 .039723744
A 20,557,400 1.3940 14,747,059 23 56 .031330048
C 2,124,298 0.8894 2,388,462 8 729 .025410901
C 2,112,888 0.9787 2,158,872 7 271 .003648854
C 2,154,765 0.9168 2,350,311 8 75 .006145207
C 2,069,482 1.0216 2,025,726 7 28 .020521330
G1 16,575,790 0.9121 18,173,216 20 26 .450245969
Random Totals: 107,372,847   107,312,480 142 2,000  
Catg D1 Exception Values: 325,396   223,571      
Catg G1 Exception Values: 7,655,540   7,823,668      
Total Test Values (4): 115,353,783   115,359,719      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 5,767,986

Confidence Interval Values (5)

State Lower Limit: 109,591,733 (State Test Value minus Margin of Error Percent)
Local Test Value: 115,353,783 (Within Confidence Interval)
State Upper Limit: 121,127,705 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 122,599,491 (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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