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2009 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 85,394,385 0.9134 93,490,678 20 3,159 .153136246
A 83,775,196 0.9208 90,980,882 17 1,520 .043824719
A 89,352,893 0.8654 103,250,396 16 921 .030096689
A 90,035,811 0.9055 99,432,149 14 503 .026065421
F1 27,309,274 0.9780 27,923,593 8 386 .029123549
F1 27,520,737 0.9372 29,364,850 12 102 .035215660
F1 29,294,939 0.8691 33,707,213 7 23 .225354108
F1 29,464,840 0.9003 32,727,802 4 6 .022543929
G1 21,560,554 0.9676 22,282,507 6 41 .012218136
G1 23,694,806 0.9289 25,508,457 4 12 .053713129
G1 19,715,363 1.0070 19,578,315 3 4 .007005837
L1 17,794,847 0.9351 19,029,887 8 295 .088051874
L1 16,035,517 0.7711 20,795,639 6 59 .171531430
L1 19,893,774 1.0782 18,450,913 6 22 .048282056
Random Totals: 580,842,936   636,523,281 131 7,053  
Catg J Exception Values: 24,445,920   24,327,642      
Catg D1 Exception Values: 23,812,040   24,676,200      
Catg G1 Exception Values: 53,187,077   54,211,898      
Catg L1 Exception Values: 14,285,939   12,964,128      
Total Test Values (4): 696,573,912   752,703,149      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 37,635,157

Confidence Interval Values (5)

Local Test Value: 696,573,912 (Outside Confidence Interval)
State Lower Limit: 715,067,992 (State Test Value minus Margin of Error Percent)
State Upper Limit: 790,338,306 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,066,898,338 (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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