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2006 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 68,975,464 0.9971 69,176,075 20 3,096 .082284738
A 69,012,135 0.8961 77,013,877 25 1,547 .063692376
A 68,924,349 0.9029 76,336,636 27 902 .017857447
A 68,967,015 0.9712 71,012,165 22 481 .013006784
F1 24,662,802 0.8820 27,962,361 9 381 .042241698
F1 24,693,699 0.8607 28,690,251 16 96 .056221685
F1 26,088,489 0.9493 27,481,817 12 22 .051620215
G1 17,051,239 0.9524 17,903,443 6 26 .004179194
G1 17,363,662 0.9766 17,779,707 4 8 .003849122
G1 17,450,836 0.9793 17,819,704 2 3 .000048641
L1 14,524,287 0.9857 14,734,997 7 333 .004762348
L1 14,645,810 0.9216 15,891,721 9 70 .036189815
L1 15,076,934 0.9795 15,392,480 9 23 .000705916
L1 13,416,221 1.0000 13,416,221 2 3
Random Totals: 460,852,942   490,611,455 170 6,991  
Catg J Exception Values: 27,486,004   31,563,193      
Catg D1 Exception Values: 7,195,190   11,561,273      
Catg F1 Exception Values: 22,003,568   21,564,187      
Catg G1 Exception Values: 41,364,392   41,987,024      
Total Test Values (4): 558,902,096   597,287,132      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 29,864,357

Confidence Interval Values (5)

Local Test Value: 558,902,096 (Outside Confidence Interval)
State Lower Limit: 567,422,775 (State Test Value minus Margin of Error Percent)
State Upper Limit: 627,151,489 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 811,794,266 (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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