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2010 Confidence Interval Detail
090/Gray
033-901/Groom ISD

Category Summary

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

Stratum
Variance
D3 2,047,877 0.9876 2,073,590 20 179 .029316970
G1 2,034,292 1.0251 1,984,482 15 21 .119389316
Random Totals: 4,082,169   4,058,072 35 200  
Catg J Exception Values: 712,523   730,761      
Catg D1 Exception Values: 1,907,100   3,550,878      
Catg G1 Exception Values: 1,627,324   1,700,596      
Total Test Values (4): 8,329,116   10,040,307      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 502,015

Confidence Interval Values (5)

Local Test Value: 8,329,116 (Outside Confidence Interval)
State Lower Limit: 9,538,292 (State Test Value minus Margin of Error Percent)
State Upper Limit: 10,542,322 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 9,744,290 (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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