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2006 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 2,024,220 0.9534 2,123,159 12 222 .035517268
G1 10,244,499 1.0030 10,213,857 10 19 .012238419
G1 9,867,581 1.0126 9,744,797 6 9 .002083092
G1 11,115,536 1.0081 11,026,224 5 6 .000628310
Random Totals: 33,251,836   33,108,037 33 256  
Catg J Exception Values: 4,291,270   4,132,966      
Catg D1 Exception Values: 4,789,980   5,361,470      
Catg G1 Exception Values: 7,796,071   7,642,005      
Total Test Values (4): 50,129,157   50,244,478      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 2,512,224

Confidence Interval Values (5)

State Lower Limit: 47,732,254 (State Test Value minus Margin of Error Percent)
Local Test Value: 50,129,157 (Within Confidence Interval)
State Upper Limit: 52,756,702 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 53,944,103 (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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