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2008 Confidence Interval Detail
114/Howard
114-901/Big Spring ISD

Category Summary

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

Stratum
Variance
A 76,204,817 1.0058 75,765,378 37 3,039 .114718994
A 82,064,478 1.0379 79,067,808 47 1,634 .034604383
A 80,295,930 0.9368 85,712,991 27 907 .023158650
A 102,074,805 1.0299 99,111,375 25 627 .011565252
F1 26,909,048 0.9506 28,307,435 18 390 .031179801
F1 27,063,126 0.9738 27,791,257 12 99 .006056822
F1 26,738,470 0.9581 27,907,807 10 22 .049286620
G1 23,601,317 0.9835 23,997,272 6 32 .030636096
G1 25,189,461 0.9755 25,822,103 4 11 .000423307
G1 22,977,006 1.0073 22,810,489 3 4 .000272024
L1 18,334,343 0.9893 18,532,642 9 330 .032552487
L1 16,594,520 1.0789 15,380,962 8 63 .008593554
L1 22,585,965 0.9351 24,153,529 7 23 .004173703
Random Totals: 550,633,286   554,361,048 213 7,181  
Catg J Exception Values: 25,991,166   25,442,518      
Catg D1 Exception Values: 13,569,728   17,936,943      
Catg F1 Exception Values: 26,728,749   28,723,392      
Catg G1 Exception Values: 68,025,195   65,588,263      
Catg L1 Exception Values: 14,359,543   14,996,537      
Total Test Values (4): 699,307,667   707,048,701      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 35,352,435

Confidence Interval Values (5)

State Lower Limit: 671,696,266 (State Test Value minus Margin of Error Percent)
Local Test Value: 699,307,667 (Within Confidence Interval)
State Upper Limit: 742,401,136 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,097,429,995 (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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