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2009 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 107,350,420 0.8761 122,532,154 8 518 .036407182
A 115,923,810 0.9824 118,000,621 16 424 .002435520
A 102,994,990 0.9531 108,063,152 15 297 .010320760
A 105,892,100 0.9641 109,835,183 8 208 .020471547
C 7,698,970 0.9060 8,497,759 9 155 .029210445
C 8,630,010 1.0012 8,619,666 8 102 .012101234
C 20,918,390 0.9951 21,021,395 6 109 .006995736
C 11,652,190 1.0419 11,183,597 4 10 .018350121
F1 12,069,300 0.9502 12,701,852 6 32 .026256890
F1 9,650,060 0.9702 9,946,465 5 12 .005499049
F1 12,055,930 0.9401 12,824,093 4 7 .003915019
L1 7,251,760 0.9927 7,305,087 7 23 .007683231
L1 10,765,570 1.0151 10,605,428 3 8 .000771435
Random Totals: 532,853,500   561,136,452 99 1,905  
Catg D1 Exception Values: 583,851   657,079      
Catg F1 Exception Values: 28,954,750   30,041,563      
Catg L1 Exception Values: 84,948,240   83,858,138      
Total Test Values (4): 647,340,341   675,693,232      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 33,784,662

Confidence Interval Values (5)

State Lower Limit: 641,908,570 (State Test Value minus Margin of Error Percent)
Local Test Value: 647,340,341 (Within Confidence Interval)
State Upper Limit: 709,477,894 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 738,479,056 (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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