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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 91,754,079 0.9395 97,662,671 13 444 .014767745
A 91,638,968 0.9239 99,187,107 14 339 .010742825
A 91,519,995 0.9888 92,556,629 17 272 .007135003
A 91,573,822 0.9749 93,931,503 14 192 .002426465
F1 8,614,544 0.8126 10,601,211 7 29 .132222454
F1 8,347,200 0.7866 10,611,747 4 12 .039689836
F1 10,032,773 0.9630 10,418,248 3 6 .007471837
L1 11,233,070 0.9712 11,566,176 7 22 .010183999
L1 26,149,182 1.0047 26,026,856 3 4 .000036996
Random Totals: 430,863,633   452,562,148 82 1,320  
Catg D1 Exception Values: 645,263   710,115      
Catg F1 Exception Values: 23,334,000   24,540,671      
Catg L1 Exception Values: 62,776,750   61,568,589      
Total Test Values (4): 517,619,646   539,381,523      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 26,969,076

Confidence Interval Values (5)

State Lower Limit: 512,412,447 (State Test Value minus Margin of Error Percent)
Local Test Value: 517,619,646 (Within Confidence Interval)
State Upper Limit: 566,350,599 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 564,940,862 (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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