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2008 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 2,246,980 0.9011 2,493,597 10 228 .048467453
G1 16,065,209 1.0787 14,893,120 8 20 .012823399
G1 16,757,753 0.9902 16,923,604 5 11 .003875353
G1 16,856,049 1.0140 16,623,322 3 6 .000807499
Random Totals: 51,925,991   50,933,643 26 265  
Catg J Exception Values: 4,619,972   4,608,380      
Catg D1 Exception Values: 4,823,270   5,370,285      
Catg G1 Exception Values: 13,009,704   12,542,245      
Total Test Values (4): 74,378,937   73,454,553      

Margin of Error

Margin of Error Percent: 5.0000005
Margin of Error Value: 3,672,728

Confidence Interval Values (5)

State Lower Limit: 69,781,825 (State Test Value minus Margin of Error Percent)
Local Test Value: 74,378,937 (Within Confidence Interval)
State Upper Limit: 77,127,281 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 98,911,732 (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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