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2006 Confidence Interval Detail
070/Ellis
070-911/Red Oak ISD

Category Summary

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

Stratum
Variance
A 209,806,348 0.9836 213,304,542 38 1,908 .003983718
A 209,597,751 0.9674 216,660,896 51 1,509 .003049504
A 209,330,981 1.0059 208,103,172 49 1,021 .002935490
A 209,563,878 1.0008 209,396,361 48 770 .004108412
F1 15,863,599 0.7695 20,615,463 9 88 .053129279
F1 16,090,932 0.8400 19,155,871 8 34 .032792803
F1 15,638,280 0.8707 17,960,583 8 18 .049337255
F1 15,050,776 0.9742 15,449,370 4 7 .010530065
Random Totals: 900,942,545   920,646,258 215 5,355  
Catg D1 Exception Values: 1,519,880   1,583,854      
Total Test Values (4): 902,462,425   922,230,112      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 46,111,506

Confidence Interval Values (5)

State Lower Limit: 876,118,606 (State Test Value minus Margin of Error Percent)
Local Test Value: 902,462,425 (Within Confidence Interval)
State Upper Limit: 968,341,618 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 999,005,256 (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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