Given a set of 25 observations, for what values of the correlation coefficient
would we be able to say that there is evidence that a relationship exists between
the two variables?
A) | rxy| ≥ 0.40
B) | rxy| ≥ 0.35
C) | rxy| ≥ 0.30
D) | rxy|≥ 0.25
Over the past 10 years, the return on Stock A has averaged 8.4% with a standard
deviation of 2.1%. The return on Stock B has averaged 3.6% with a standard
deviation of 0.9%. Which of the following statements is true?
A) Stock A has smaller relative variation than Stock B.
B) Stock B has smaller relative variation than Stock A.
C) Both stocks exhibit the same relative variation.
D) Unable to tell with the given information.
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