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2011 Confidence Interval Detail
152/Lubbock
152-908/Roosevelt ISD

Category Summary

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

Stratum
Variance
A 28,936,424 0.9574 30,223,965 10 594 .071107124
A 27,818,981 0.9163 30,360,123 10 257 .007704757
A 30,204,394 0.9530 31,694,013 10 188 .014379928
A 34,145,122 0.9985 34,196,417 10 120 .011665477
D3 15,535,651 0.7908 19,645,487 15 869 .120602946
G1 60,181,484 1.0217 58,903,283 8 49 .013213053
Random Totals: 196,822,056   205,023,288 63 2,077  
Catg D1 Exception Values: 19,550,119   17,633,770      
Catg G1 Exception Values: 16,770,204   16,427,082      
Total Test Values (4): 233,142,379   239,084,140      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 11,954,207

Confidence Interval Values (5)

State Lower Limit: 227,129,933 (State Test Value minus Margin of Error Percent)
Local Test Value: 233,142,379 (Within Confidence Interval)
State Upper Limit: 251,038,347 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 242,778,911 (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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