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2011 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 6,476,260 1.0716 6,043,542 15 220 .200611783
A 6,529,820 0.8609 7,584,876 10 100 .033096139
A 6,378,730 1.0603 6,015,967 12 56 .014060081
A 6,738,750 1.2040 5,596,968 10 29 .124021915
D3 17,454,720 0.9028 19,333,983 15 1,020 .033169147
G1 4,539,840 0.9858 4,605,234 7 19 .003782722
G1 4,930,321 0.9780 5,041,228 5 9 .006969740
G1 4,849,050 1.0091 4,805,322 3 5 .011231366
Random Totals: 57,897,491   59,027,120 77 1,458  
Catg J Exception Values: 12,893,298   13,433,253      
Catg D1 Exception Values: 6,318,870   6,618,507      
Catg G1 Exception Values: 3,791,750   3,936,239      
Total Test Values (4): 80,901,409   83,015,119      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 4,150,756

Confidence Interval Values (5)

State Lower Limit: 78,864,363 (State Test Value minus Margin of Error Percent)
Local Test Value: 80,901,409 (Within Confidence Interval)
State Upper Limit: 87,165,875 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 90,476,398 (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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