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2009 Confidence Interval Detail
025/Brown
025-906/Zephyr ISD

Category Summary

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

Stratum
Variance
A 1,158,100 1.0087 1,148,111 9 46 .010553124
A 1,205,850 1.0372 1,162,601 8 27 .008525251
A 1,270,070 0.9855 1,288,757 7 19 .003072292
A 1,084,000 1.0176 1,065,252 7 10 .004339016
D3 17,829,499 1.0000 17,829,499 35 770 .075397345
Random Totals: 22,547,519   22,494,220 66 872  
Catg J Exception Values: 6,690,640   6,740,779      
Catg D1 Exception Values: 2,960,620   3,004,555      
Total Test Values (4): 32,198,779   32,239,554      

Margin of Error

Margin of Error Percent: 5.0269988
Margin of Error Value: 1,620,682

Confidence Interval Values (5)

State Lower Limit: 30,618,872 (State Test Value minus Margin of Error Percent)
Local Test Value: 32,198,779 (Within Confidence Interval)
State Upper Limit: 33,860,236 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 31,320,138 (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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