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2010 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 2,343,673,810 0.9887 2,370,460,008 75 25,684 .006867394
A 2,185,302,010 0.9944 2,197,608,618 75 17,734 .005753916
A 2,268,825,090 1.0149 2,235,515,903 75 14,046 .004370385
A 2,269,379,250 0.9933 2,284,686,651 75 9,168 .006303459
B 143,968,740 0.9720 148,115,988 21 897 .009633474
B 141,398,850 0.7619 185,587,151 10 54 .034413456
B 136,034,010 0.8362 162,681,189 7 19 .028547928
B 149,562,080 0.9293 160,940,579 6 10 .009101610
C 67,045,680 0.9453 70,925,294 12 1,508 .057500733
C 79,302,570 1.0108 78,455,253 10 420 .020612620
C 74,812,910 0.9166 81,620,020 9 122 .047614397
C 74,260,120 1.0120 73,379,565 8 33 .001842751
F1 568,116,440 0.9247 614,379,193 20 1,224 .078447261
F1 574,383,340 0.9962 576,574,322 10 346 .036344496
F1 531,839,310 0.9506 559,477,498 11 124 .004737679
F1 502,453,750 0.9654 520,461,726 8 39 .008778084
L1 233,218,940 1.2316 189,362,569 10 1,389 .084836660
L1 216,947,570 1.0541 205,813,082 10 232 .003219319
L1 242,558,290 1.0983 220,848,848 10 63 .004740494
L1 164,437,950 1.0421 157,794,789 6 13 .005502612
Random Totals: 12,967,520,710   13,094,688,246 468 73,125  
Catg J Exception Values: 155,547,285   141,403,604      
Catg D1 Exception Values: 456,332   404,039      
Total Test Values (4): 13,123,524,327   13,236,495,889      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 661,824,794

Confidence Interval Values (5)

State Lower Limit: 12,574,671,095 (State Test Value minus Margin of Error Percent)
Local Test Value: 13,123,524,327 (Within Confidence Interval)
State Upper Limit: 13,898,320,683 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 13,386,834,486 (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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