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2006 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 233,713,978 1.0209 228,929,354 22 2,657 .011130015
A 233,694,134 1.0212 228,842,669 22 2,049 .004843749
A 233,414,421 1.0064 231,930,069 21 1,713 .006759497
A 233,580,397 1.0255 227,772,206 20 1,268 .002448079
B 17,144,237 1.0150 16,890,874 9 238 .015566304
B 19,759,432 0.7906 24,992,957 7 37 .008744334
B 16,976,629 0.8424 20,152,693 3 4 .065125573
F1 53,360,753 0.9326 57,217,192 7 161 .004184575
F1 56,684,598 0.9617 58,942,080 6 34 .015088784
F1 48,853,087 0.8476 57,636,960 4 8 .027112331
F1 51,857,713 0.9998 51,868,087 3 4 .000839478
L1 23,453,064 1.0665 21,990,684 7 191 .019590971
L1 24,703,609 0.9671 25,544,007 8 27 .177401361
L1 23,263,633 1.0001 23,261,307 3 7 .000000034
Random Totals: 1,270,459,685   1,275,971,139 142 8,398  
Catg J Exception Values: 108,566,461   134,483,849      
Catg D1 Exception Values: 1,162,374   1,375,004      
Catg B Exception Values: 13,835,170   17,240,000      
Catg L1 Exception Values: 17,812,880   17,471,473      
Total Test Values (4): 1,411,836,570   1,446,541,465      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 72,327,073

Confidence Interval Values (5)

State Lower Limit: 1,374,214,392 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,411,836,570 (Within Confidence Interval)
State Upper Limit: 1,518,868,538 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,485,801,259 (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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