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2008 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 1,179,420 1.0203 1,155,954 8 52 .004537834
A 1,079,750 1.0037 1,075,770 5 26 .000618300
A 1,295,470 0.9772 1,325,696 10 20 .001012084
A 1,192,950 0.9465 1,260,380 5 10 .004880156
D3 16,628,399 1.0001 16,626,736 34 766 .026642024
Random Totals: 21,375,989   21,444,536 62 874  
Catg J Exception Values: 6,911,800   6,913,646      
Catg D1 Exception Values: 2,949,080   2,817,239      
Total Test Values (4): 31,236,869   31,175,421      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 1,558,771

Confidence Interval Values (5)

State Lower Limit: 29,616,650 (State Test Value minus Margin of Error Percent)
Local Test Value: 31,236,869 (Within Confidence Interval)
State Upper Limit: 32,734,192 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 30,483,595 (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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