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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 2,360,233,432 0.9776 2,414,314,067 41 24,194 .003142486
A 2,358,893,990 0.9966 2,366,941,591 47 18,817 .002411036
A 2,359,615,091 0.9888 2,386,342,123 48 14,802 .001507603
A 2,359,042,770 0.9855 2,393,752,177 50 9,726 .001527341
B 153,198,937 0.8760 174,884,631 12 949 .065964479
B 153,127,558 0.8664 176,740,025 6 68 .004908436
B 157,509,146 0.9237 170,519,807 5 23 .011146296
B 148,642,795 0.9243 160,816,613 5 9 .067740348
C 67,705,132 0.9903 68,368,305 7 1,725 .043816138
C 67,347,667 1.0366 64,969,773 12 534 .005154058
C 67,938,020 1.0085 67,365,414 7 136 .003990601
C 66,918,974 1.0104 66,230,180 6 36 .007307125
F1 584,474,799 0.8662 674,757,330 8 1,206 .029004733
F1 584,580,599 0.9046 646,231,040 10 325 .017251584
F1 588,416,102 0.9329 630,738,667 7 124 .008992952
F1 577,185,742 1.1025 523,524,483 6 41 .151280310
L1 228,459,986 1.3137 173,905,752 7 1,438 .077009792
L1 227,776,731 1.0635 214,176,522 7 216 .003508642
L1 228,762,508 1.0309 221,905,624 7 57 .026932580
L1 227,140,718 0.9953 228,213,321 7 14 .006002383
Random Totals: 13,566,970,697   13,824,697,445 305 74,440  
Catg D1 Exception Values: 483,184   470,808      
Total Test Values (4): 13,567,453,881   13,825,168,253      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 691,258,413

Confidence Interval Values (5)

State Lower Limit: 13,133,909,840 (State Test Value minus Margin of Error Percent)
Local Test Value: 13,567,453,881 (Within Confidence Interval)
State Upper Limit: 14,516,426,666 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 13,808,092,823 (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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