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2009 Confidence Interval Detail
198/Robertson
198-906/Mumford ISD

Category Summary

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

Stratum
Variance
D3 5,037,740 0.7710 6,534,034 10 231 .053719367
G1 15,607,935 1.0618 14,699,506 6 24 .013273376
G1 14,388,941 1.0035 14,338,755 4 10 .031980127
G1 15,601,841 1.0953 14,244,354 3 6 .007728912
Random Totals: 50,636,457   49,816,649 23 271  
Catg J Exception Values: 5,155,690   5,350,217      
Catg D1 Exception Values: 4,733,270   5,111,652      
Catg G1 Exception Values: 12,240,576   12,151,403      
Total Test Values (4): 72,765,993   72,429,921      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 3,621,496

Confidence Interval Values (5)

State Lower Limit: 68,808,425 (State Test Value minus Margin of Error Percent)
Local Test Value: 72,765,993 (Within Confidence Interval)
State Upper Limit: 76,051,417 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 84,327,651 (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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