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2007 Confidence Interval Detail
152/Lubbock
152-901/Lubbock ISD

Category Summary

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

Stratum
Variance
A 1,149,778,045 0.9222 1,246,777,321 75 17,891 .048089677
A 1,149,538,060 0.9754 1,178,529,895 75 11,600 .009774313
A 1,149,684,047 0.9887 1,162,823,958 75 8,150 .013250815
A 1,149,467,205 0.9375 1,226,098,352 74 4,096 .025856700
B 179,881,510 0.9094 197,802,408 80 1,494 .067057927
B 182,117,329 1.1052 164,782,238 7 366 .073336812
B 180,102,827 0.9733 185,043,488 6 37 .006962502
B 176,561,832 0.9606 183,803,698 4 7 .004337128
F1 420,345,568 0.9317 451,159,781 32 1,649 .038627010
F1 420,750,261 1.0341 406,875,796 7 449 .017091451
F1 420,302,854 1.0017 419,589,552 7 151 .007553060
F1 417,849,455 0.9449 442,215,531 6 34 .006217191
L1 217,177,523 1.0600 204,884,456 7 2,303 .005387545
L1 217,126,082 0.9915 218,987,476 7 366 .000466781
L1 217,316,974 0.9902 219,467,758 7 118 .001515819
L1 216,862,213 0.9938 218,215,147 6 30 .000701044
Random Totals: 7,864,861,785   8,127,056,855 475 48,741  
Catg D1 Exception Values: 3,357,274   2,257,580      
Total Test Values (4): 7,868,219,059   8,129,314,435      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 406,465,722

Confidence Interval Values (5)

State Lower Limit: 7,722,848,713 (State Test Value minus Margin of Error Percent)
Local Test Value: 7,868,219,059 (Within Confidence Interval)
State Upper Limit: 8,535,780,157 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,989,157,138 (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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