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2007 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 2,359,858,295 0.9776 2,413,930,334 41 24,194 .003142486
A 2,358,519,067 0.9966 2,366,565,389 47 18,817 .002411036
A 2,359,240,053 0.9888 2,385,962,837 48 14,802 .001507603
A 2,358,667,823 0.9855 2,393,371,713 50 9,726 .001527341
B 151,826,304 0.8760 173,317,699 12 949 .065964479
B 151,755,565 0.8664 175,156,469 6 68 .004908436
B 156,097,895 0.9237 168,991,983 5 23 .011146296
B 147,310,984 0.9243 159,375,726 5 9 .067740348
C 66,235,716 0.9903 66,884,496 7 1,725 .043816138
C 65,886,010 1.0366 63,559,724 12 534 .005154058
C 66,463,550 1.0085 65,903,371 7 136 .003990601
C 65,466,621 1.0104 64,792,776 6 36 .007307125
F1 573,727,043 0.8662 662,349,392 8 1,206 .029004733
F1 573,830,898 0.9046 634,347,665 10 325 .017251584
F1 577,595,871 0.9329 619,140,177 7 124 .008992952
F1 566,572,022 1.1025 513,897,526 6 41 .151280310
L1 229,699,059 1.3137 174,848,945 7 1,438 .077009792
L1 229,012,097 1.0635 215,338,126 7 216 .003508642
L1 230,003,221 1.0309 223,109,148 7 57 .026932580
L1 228,372,635 0.9953 229,451,055 7 14 .006002383
Random Totals: 13,516,140,729   13,770,294,551 305 74,440  
Catg D1 Exception Values: 483,184   469,949      
Total Test Values (4): 13,516,623,913   13,770,764,500      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 688,538,225

Confidence Interval Values (5)

State Lower Limit: 13,082,226,275 (State Test Value minus Margin of Error Percent)
Local Test Value: 13,516,623,913 (Within Confidence Interval)
State Upper Limit: 14,459,302,725 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 13,645,081,708 (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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