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With a reliability coefficient of .90, the percentage of total variance of test scores attributable to unsystematic error is:


A) practically zero
B) 10
C) 81
D) 90

E) B) and D)
F) A) and B)

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The standard deviation of a particular subtest of the WISC-IV is 3, and the reliability coefficient is .84.What is the standard error of measurement of that subtest?


A) .48
B) 1.20
C) 2.75
D) 3.00

E) None of the above
F) B) and C)

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