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2009 Confidence Interval Detail
198/Robertson
198-902/Calvert ISD

Category Summary

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

Stratum
Variance
A 4,006,770 0.7914 5,062,889 15 199 .240626137
A 4,939,660 0.8576 5,759,865 17 119 .033549903
A 5,389,540 0.7002 7,697,144 18 79 .102402037
A 8,264,210 0.8426 9,807,987 18 61 .023206292
D3 18,554,750 0.7081 26,203,573 21 1,013 .046493397
G1 6,986,275 0.9517 7,340,837 15 17 .064374648
Random Totals: 48,141,205   61,872,295 104 1,488  
Catg J Exception Values: 11,344,280   11,738,127      
Catg D1 Exception Values: 6,054,180   6,598,544      
Catg G1 Exception Values: 8,931,981   8,831,895      
Total Test Values (4): 74,471,646   89,040,861      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 4,452,043

Confidence Interval Values (5)

Local Test Value: 74,471,646 (Outside Confidence Interval)
State Lower Limit: 84,588,818 (State Test Value minus Margin of Error Percent)
State Upper Limit: 93,492,904 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 87,847,683 (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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