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2007 Confidence Interval Detail
057/Dallas
057-916/Richardson ISD

Category Summary

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

Stratum
Variance
A 2,328,879,108 0.9987 2,331,910,592 70 17,424 .001221070
A 2,328,081,575 1.0018 2,323,898,558 73 12,666 .001049010
A 2,327,386,318 0.9968 2,334,857,863 74 9,496 .000742199
A 2,327,998,053 0.9911 2,348,903,292 70 5,965 .002834902
B 313,913,804 0.9157 342,812,934 10 663 .096965260
B 313,360,783 0.9307 336,693,653 6 58 .022203279
B 323,996,768 0.8912 363,551,131 6 29 .006059241
B 302,250,261 0.9253 326,651,098 6 11 .007504278
F1 1,132,158,131 0.8610 1,314,933,950 11 814 .072943694
F1 1,131,025,137 0.8693 1,301,075,736 11 242 .031402835
F1 1,148,043,747 0.8364 1,372,601,324 10 83 .012963748
F1 1,107,592,752 0.9841 1,125,488,011 7 17 .009400010
L1 329,688,144 1.2058 273,418,597 7 2,291 .008478365
L1 330,468,127 1.0062 328,431,850 7 333 .039079241
L1 335,851,886 1.0652 315,294,673 7 97 .012759137
L1 322,611,649 1.0289 313,550,052 6 18 .016835245
Random Totals: 16,403,306,243   17,054,073,314 381 50,207  
Catg D1 Exception Values: 8,404   9,837      
Total Test Values (4): 16,403,314,647   17,054,083,151      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 852,704,158

Confidence Interval Values (5)

State Lower Limit: 16,201,378,993 (State Test Value minus Margin of Error Percent)
Local Test Value: 16,403,314,647 (Within Confidence Interval)
State Upper Limit: 17,906,787,309 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 17,237,801,052 (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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