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2007 Confidence Interval Detail
123/Jefferson
123-907/Port Arthur ISD

Category Summary

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

Stratum
Variance
A 181,642,362 1.0964 165,671,618 33 7,548 .037889004
A 181,630,683 1.0610 171,188,203 44 3,930 .066920177
A 181,656,887 0.9609 189,048,691 46 2,334 .060980325
A 181,605,803 0.9745 186,357,930 55 1,125 .006212332
F1 85,602,728 0.9183 93,218,695 11 469 .053413547
F1 85,060,401 0.8926 95,295,094 7 72 .023075567
F1 94,246,416 0.9648 97,684,925 6 17 .005000182
L1 45,290,054 0.9554 47,404,285 8 472 .015733476
L1 46,348,007 0.9976 46,459,510 7 63 .002456820
L1 47,454,682 1.0086 47,050,052 4 12 .005254506
Random Totals: 1,130,538,023   1,139,379,003 221 16,042  
Catg J Exception Values: 54,050,159   53,925,223      
Catg D1 Exception Values: 412,190   245,188      
Catg F1 Exception Values: 19,828,840   19,989,526      
Catg L1 Exception Values: 31,671,880   33,559,820      
Total Test Values (4): 1,236,501,092   1,247,098,760      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 62,354,938

Confidence Interval Values (5)

State Lower Limit: 1,184,743,822 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,236,501,092 (Within Confidence Interval)
State Upper Limit: 1,309,453,698 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 4,234,161,590 (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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