题目内容

A nursery sells trees of different types and heights. Suppose that 75 pine trees are sold for planting at City Hall. These 75 trees average 60 inches in height with a standard deviation of 16 inches. Using this information, construct a 95 percent confidence interval for the mean height of all trees in the nursery:（）

A. 60±1.96(16).
B. 0.8±1.96(16).
C. 60±1.96(1.85).

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A basic assumption of technical analysis in contrast to fundamental analysis is that:（）

A. security prices move in patterns, which repeat over long periods.
B. aggregate supply of and demand for goods and services are key determinants of stock value.
C. a stock’s market price will approach its intrinsic value over time.

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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.

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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. 60±1.96(16). B. 0.8±1.96(16). C. 60±1.96(1.85).

A basic assumption of technical analysis in contrast to fundamental analysis is that:（）

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 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. 60±1.96(16).
B. 0.8±1.96(16).
C. 60±1.96(1.85).