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2009 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 2,371,554,150 1.0068 2,355,536,502 46 24,885 .006359220
A 2,134,935,630 0.9885 2,159,773,020 54 17,088 .002637671
A 2,376,574,140 0.9816 2,421,122,800 50 14,584 .005797081
A 2,233,920,240 0.9873 2,262,655,971 49 8,898 .006503610
B 173,826,930 1.0297 168,813,179 15 867 .003571970
B 170,886,970 1.0518 162,470,974 6 48 .019216104
B 146,473,300 0.9320 157,160,193 5 17 .005150572
B 109,420,710 0.9700 112,804,856 4 6 .003720581
C 76,209,220 1.1254 67,717,452 7 1,588 .046322082
C 74,226,570 0.9506 78,083,915 7 330 .017185159
C 71,854,930 0.9682 74,214,966 7 102 .010932958
C 62,483,780 1.0183 61,360,876 6 22 .005647522
F1 604,072,840 0.8029 752,363,731 8 1,240 .047349297
F1 607,318,820 0.9169 662,361,021 7 333 .019288450
F1 603,871,390 0.8998 671,117,348 7 123 .013618438
F1 490,786,340 0.9318 526,707,813 6 33 .018966480
L1 242,983,740 1.0112 240,292,464 7 1,462 .028731233
L1 237,017,310 1.0798 219,501,121 7 234 .008335693
L1 253,295,500 1.0951 231,298,968 6 59 .015233939
L1 219,751,860 1.0187 215,717,935 5 13 .000690954
Random Totals: 13,261,464,370   13,601,075,105 309 71,932  
Catg D1 Exception Values: 472,382   458,195      
Total Test Values (4): 13,261,936,752   13,601,533,300      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 680,076,665

Confidence Interval Values (5)

State Lower Limit: 12,921,456,635 (State Test Value minus Margin of Error Percent)
Local Test Value: 13,261,936,752 (Within Confidence Interval)
State Upper Limit: 14,281,609,965 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 13,765,682,873 (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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