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2008 Confidence Interval Detail
057/Dallas
057-913/Lancaster ISD

Category Summary

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

Stratum
Variance
A 261,882,360 0.9415 278,154,392 15 3,093 .026708925
A 266,500,140 0.9795 272,077,734 15 2,434 .001121340
A 257,960,400 0.9934 259,674,250 22 1,975 .000686536
A 257,000,220 1.0158 253,002,776 30 1,485 .003212085
F1 64,695,120 0.8651 74,783,401 14 167 .035260094
F1 66,659,260 0.8786 75,869,861 10 36 .023172157
F1 42,288,330 0.8956 47,217,876 6 8 .009638311
F1 74,320,220 0.9389 79,156,694 3 5 .000522797
L1 25,856,250 1.1145 23,199,865 7 187 .011926596
L1 27,254,860 1.0198 26,725,691 7 31 .004773718
L1 18,606,500 0.9167 20,297,262 4 6 .024171279
Random Totals: 1,363,023,660   1,410,159,802 133 9,427  
Catg J Exception Values: 126,247,899   144,382,317      
Catg D1 Exception Values: 1,371,327   1,774,231      
Catg L1 Exception Values: 19,508,180   17,811,589      
Total Test Values (4): 1,510,151,066   1,574,127,939      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 78,706,397

Confidence Interval Values (5)

State Lower Limit: 1,495,421,542 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,510,151,066 (Within Confidence Interval)
State Upper Limit: 1,652,834,336 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,698,056,655 (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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