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2007 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 91,673,578 0.9395 97,576,986 13 444 .014767745
A 91,558,569 0.9239 99,100,086 14 339 .010742825
A 91,439,700 0.9888 92,475,425 17 272 .007135003
A 91,493,480 0.9749 93,849,092 14 192 .002426465
F1 8,868,503 0.8126 10,913,737 7 29 .132222454
F1 8,593,277 0.7866 10,924,583 4 12 .039689836
F1 10,328,542 0.9630 10,725,381 3 6 .007471837
L1 11,284,550 0.9712 11,619,182 7 22 .010183999
L1 26,269,022 1.0047 26,146,135 3 4 .000036996
Random Totals: 431,509,221   453,330,607 82 1,320  
Catg D1 Exception Values: 645,263   708,858      
Catg F1 Exception Values: 23,334,000   24,540,671      
Catg L1 Exception Values: 62,776,750   61,568,589      
Total Test Values (4): 518,265,234   540,148,725      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 27,007,436

Confidence Interval Values (5)

State Lower Limit: 513,141,289 (State Test Value minus Margin of Error Percent)
Local Test Value: 518,265,234 (Within Confidence Interval)
State Upper Limit: 567,156,161 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 562,134,345 (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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