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2011 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 87,049,467 0.9293 93,672,083 29 3,140 .192981253
A 88,083,495 0.9825 89,652,412 18 1,531 .056372035
A 86,657,459 0.9636 89,930,945 12 855 .027852813
A 90,702,354 0.9543 95,045,954 13 496 .003559636
F1 31,104,372 0.9015 34,502,908 13 382 .053533945
F1 29,034,874 0.9571 30,336,301 12 83 .002440115
F1 39,290,005 0.9286 42,311,011 12 21 .005852927
F1 21,299,937 0.9743 21,861,785 3 3 .000954376
G1 63,514,351 0.9950 63,833,519 8 49 .001414813
G1 62,512,750 0.9971 62,694,564 6 17 .002049925
G1 60,724,769 0.9859 61,593,234 3 5 .001941906
L1 16,135,206 0.9899 16,299,834 10 269 .003082477
L1 16,235,234 0.9971 16,282,453 11 62 .000915691
L1 18,599,610 0.9979 18,638,751 10 24 .000614823
L1 17,258,267 0.9663 17,860,154 3 5 .001747755
Random Totals: 728,202,150   754,515,908 163 6,942  
Catg J Exception Values: 11,755,124   11,414,881      
Catg D1 Exception Values: 25,655,646   22,081,864      
Catg G1 Exception Values: 60,752,927   56,137,666      
Total Test Values (4): 826,365,847   844,150,319      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 42,207,516

Confidence Interval Values (5)

State Lower Limit: 801,942,803 (State Test Value minus Margin of Error Percent)
Local Test Value: 826,365,847 (Within Confidence Interval)
State Upper Limit: 886,357,835 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,253,669,715 (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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