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2006 Confidence Interval Detail
057/Dallas
057-909/Garland ISD

Category Summary

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

Stratum
Variance
A 2,290,390,018 1.0058 2,277,182,360 45 23,826 .007779646
A 2,289,945,700 1.0089 2,269,744,970 47 18,583 .002931399
A 2,289,822,570 1.0216 2,241,408,154 48 14,654 .002988147
A 2,289,772,311 1.0016 2,286,114,528 49 9,784 .002510050
B 140,018,706 1.0003 139,976,713 19 937 .001830758
B 140,716,278 1.0491 134,130,472 6 66 .002569702
B 141,122,851 0.9201 153,377,732 8 22 .018383466
B 136,764,278 0.9883 138,383,363 6 9 .052890948
F1 479,010,394 1.0381 461,429,914 12 1,189 .002283609
F1 481,284,455 0.8614 558,723,537 8 340 .050601575
F1 481,478,508 0.8733 551,332,312 7 127 .046456621
F1 474,022,401 0.9834 482,023,999 6 44 .003250431
L1 221,937,647 1.0806 205,383,719 7 1,374 .001100444
L1 222,860,775 1.0068 221,355,557 7 197 .000097026
L1 226,941,417 1.0492 216,299,482 7 50 .006245011
L1 214,912,292 1.0629 202,194,272 6 10 .006655509
Random Totals: 12,521,000,601   12,539,061,084 288 71,212  
Catg D1 Exception Values: 550,340   552,539      
Total Test Values (4): 12,521,550,941   12,539,613,623      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 626,980,681

Confidence Interval Values (5)

State Lower Limit: 11,912,632,942 (State Test Value minus Margin of Error Percent)
Local Test Value: 12,521,550,941 (Within Confidence Interval)
State Upper Limit: 13,166,594,304 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 12,906,875,408 (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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