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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 2,329,185,074 0.9987 2,332,216,956 70 17,424 .001221070
A 2,328,387,436 1.0018 2,324,203,869 73 12,666 .001049010
A 2,327,692,086 0.9968 2,335,164,613 74 9,496 .000742199
A 2,328,303,902 0.9911 2,349,211,888 70 5,965 .002834902
B 315,372,910 0.9157 344,406,367 10 663 .096965260
B 314,817,319 0.9307 338,258,643 6 58 .022203279
B 325,502,741 0.8912 365,240,957 6 29 .006059241
B 303,655,154 0.9253 328,169,409 6 11 .007504278
F1 1,145,126,989 0.8610 1,329,996,503 11 814 .072943694
F1 1,143,981,016 0.8693 1,315,979,542 11 242 .031402835
F1 1,161,194,574 0.8364 1,388,324,455 10 83 .012963748
F1 1,120,280,213 0.9841 1,138,380,462 7 17 .009400010
L1 329,410,228 1.2058 273,188,114 7 2,291 .008478365
L1 330,189,553 1.0062 328,154,992 7 333 .039079241
L1 335,568,773 1.0652 315,028,889 7 97 .012759137
L1 322,339,698 1.0289 313,285,740 6 18 .016835245
Random Totals: 16,461,007,666   17,119,211,399 381 50,207  
Catg D1 Exception Values: 8,404   9,855      
Total Test Values (4): 16,461,016,070   17,119,221,254      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 855,961,063

Confidence Interval Values (5)

State Lower Limit: 16,263,260,191 (State Test Value minus Margin of Error Percent)
Local Test Value: 16,461,016,070 (Within Confidence Interval)
State Upper Limit: 17,975,182,317 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 17,335,171,771 (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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