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2008 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 1,081,910,449 0.9583 1,128,989,303 76 16,931 .024185509
A 1,183,400,983 0.9944 1,190,065,349 75 11,950 .014307736
A 1,288,443,246 0.9911 1,300,013,365 73 9,325 .011576698
A 1,257,112,616 0.9739 1,290,802,563 75 4,399 .010244665
B 188,939,814 0.9913 190,598,017 31 1,620 .034636046
B 167,076,639 0.6929 241,126,626 7 290 1.761724220
B 177,856,309 0.9326 190,710,175 6 39 .026475025
B 182,398,475 0.9819 185,760,744 4 8 .006044307
F1 430,946,891 0.9920 434,422,269 36 1,719 .039997990
F1 464,413,250 0.9385 494,846,297 8 486 .056754689
F1 475,368,301 0.9696 490,272,588 7 157 .070027976
F1 448,473,233 1.0239 438,004,916 6 33 .002319449
L1 217,208,893 1.0555 205,787,677 7 2,069 .042698478
L1 221,713,306 1.0862 204,118,308 7 345 .019576903
L1 232,816,454 0.9168 253,944,649 7 109 .020083810
L1 224,646,588 0.9826 228,624,657 5 26 .003674745
Random Totals: 8,242,725,447   8,468,087,503 430 49,506  
Catg D1 Exception Values: 3,667,109   2,611,377      
Total Test Values (4): 8,246,392,556   8,470,698,880      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 423,534,944

Confidence Interval Values (5)

State Lower Limit: 8,047,163,936 (State Test Value minus Margin of Error Percent)
Local Test Value: 8,246,392,556 (Within Confidence Interval)
State Upper Limit: 8,894,233,824 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 8,311,316,365 (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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