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2008 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 2,306,035,740 1.0109 2,281,170,976 36 24,233 .006072891
A 2,324,844,270 0.9793 2,373,985,776 44 18,781 .002238147
A 2,388,575,190 1.0073 2,371,264,956 42 14,914 .004247827
A 2,518,175,210 0.9825 2,563,028,204 45 10,181 .004412153
B 151,156,170 1.0194 148,279,547 15 905 .005184072
B 138,351,420 0.9606 144,026,046 6 53 .009713450
B 179,287,890 0.9484 189,042,482 5 25 .001122020
B 213,753,330 0.9762 218,964,690 4 12 .002301411
C 67,871,490 0.8886 76,380,250 13 1,619 .050931005
C 72,733,300 0.9206 79,006,409 8 402 .029892164
C 76,718,990 1.0690 71,767,063 7 129 .015610199
C 91,536,680 0.9800 93,404,776 6 46 .002451524
F1 610,271,170 0.8961 681,030,209 17 1,247 .031381408
F1 607,520,610 0.8579 708,148,514 14 330 .039764068
F1 594,357,190 0.8934 665,275,565 11 121 .030699606
F1 614,196,800 0.9114 673,904,762 9 41 .018078608
L1 237,365,340 0.9885 240,126,798 7 1,518 .021810413
L1 254,475,280 1.0539 241,460,556 7 256 .003978576
L1 217,808,600 1.0620 205,092,844 7 52 .018834328
L1 252,187,030 1.0259 245,820,285 5 17 .001305515
Random Totals: 13,917,221,700   14,271,180,708 308 74,882  
Catg D1 Exception Values: 421,918   409,674      
Total Test Values (4): 13,917,643,618   14,271,590,382      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 713,579,519

Confidence Interval Values (5)

State Lower Limit: 13,558,010,863 (State Test Value minus Margin of Error Percent)
Local Test Value: 13,917,643,618 (Within Confidence Interval)
State Upper Limit: 14,985,169,901 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 14,152,036,786 (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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