题目内容

If the null hypothesis is innocence, then the statement "It is better that the guilty go free, than the innocent are punished" is an example of preferring a:（）

A. type I error over a type Ⅱ error.
B. two tailed test over a one tailed test.
C. type Ⅱ error over a type I error.

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A portfolio manager is looking at an investment that has an expected annual return of 10% with a standard deviation of annual returns of 5%. Assuming the returns are approximately normally distributed, the probability that the return will exceed 20% in any given year is closest to:（）

A. 0.0%.
B. 4.56%.
C. 2.28%.

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Which of the following is the best method to avoid data mining bias when testing a profitable trading strategy（）

A. Increase the sample size to at least 30 observations per year.
B. Test the strategy on a different data set than the one used to develop the rules.
C. Use a sample free of survivorship bias.

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A local high school basketball team had 18 home games this season and averaged 58 points per game. If we assume that the number of points made in home games is normally distributed, which of the following is most likely the range of points for a confidence interval of 90 percent（）

A. 26 to 80.
B. 24 to 78.
C. 34 to 82.

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Which one of the following best characterizes the alternative hypothesis The alternative hypothesis is usually the:（）

A. hypothesis that is proved through statistical testing.
B. hoped -for outcome.
C. hypothesis to be proved through statistical testing.

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If the null hypothesis is innocence, then the statement "It is better that the guilty go free, than the innocent are punished" is an example of preferring a:（）

A. type I error over a type Ⅱ error. B. two tailed test over a one tailed test. C. type Ⅱ error over a type I error.

A portfolio manager is looking at an investment that has an expected annual return of 10% with a standard deviation of annual returns of 5%. Assuming the returns are approximately normally distributed, the probability that the return will exceed 20% in any given year is closest to:（）

Which of the following is the best method to avoid data mining bias when testing a profitable trading strategy（）

A local high school basketball team had 18 home games this season and averaged 58 points per game. If we assume that the number of points made in home games is normally distributed, which of the following is most likely the range of points for a confidence interval of 90 percent（）

Which one of the following best characterizes the alternative hypothesis The alternative hypothesis is usually the:（）

A. type I error over a type Ⅱ error.
B. two tailed test over a one tailed test.
C. type Ⅱ error over a type I error.