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2008 Confidence Interval Detail
057/Dallas
057-919/Sunnyvale ISD

Category Summary

(1)
Category
(1)
Local
Value
(1)
Stratum
Ratio
(1)
State
Value
(2)
Sample
Size
(3)
Total
Parcels

Stratum
Variance
A 88,129,570 1.0113 87,144,833 8 446 .001392410
A 93,940,000 0.9650 97,347,150 14 365 .003983780
A 125,562,610 0.9833 127,695,118 18 376 .002261016
A 110,422,810 0.9913 111,391,920 7 226 .000970690
C 4,936,970 0.9555 5,166,897 7 123 .002763790
C 11,406,080 1.0193 11,190,111 7 186 .001348109
C 13,652,060 1.0452 13,061,672 6 125 .002582725
C 13,840,660 1.0627 13,024,052 5 23 .003388427
F1 12,360,300 1.0035 12,317,190 5 37 .039400266
F1 10,561,380 0.9109 11,594,445 6 15 .028326465
F1 11,068,980 0.8771 12,619,975 4 8 .012767891
L1 19,007,520 1.0109 18,802,572 7 31 .000976453
Random Totals: 514,888,940   521,355,935 94 1,961  
Catg D1 Exception Values: 622,938   713,104      
Catg F1 Exception Values: 26,085,140   27,584,000      
Catg L1 Exception Values: 78,277,440   77,931,542      
Total Test Values (4): 619,874,458   627,584,581      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 31,379,229

Confidence Interval Values (5)

State Lower Limit: 596,205,352 (State Test Value minus Margin of Error Percent)
Local Test Value: 619,874,458 (Within Confidence Interval)
State Upper Limit: 658,963,810 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 647,876,008 (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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