题目内容

An equity analyst needs to select a representative sample of manufacturing stocks. Starting with the population of all publicly traded manufacturing stocks, she classifies each stock into one of the 20 industry groups that form the Index of" Industrial Production for the manufacturing industry. She then selects a number of stocks from each industry based on its weight in the index. The sampling method the analyst is using is best characterized as:()

A. data mining.
B. nonrandom sampling.
C. stratified random sampling.

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Which of the following statements regarding the speed at which analysts believe stock prices reflect new information is most likely accurate()

A. Technicians believe that prices adjust quickly to new information.
Both technicians and followers of the efficient market hypothesis believe prices adjust slowly to new information.
C. Followers of the efficient market hypothesis believe prices adjust quickly to new information.

The mean and standard deviation of four portfolios are listed below in percentage terms. Using Roy’s safety- first criteria and a threshold of 4 percent, select the mean and standard deviation that corresponds to the optimal portfolio. Mean Standard Deviation()①A. 14 20 ②B. 8 10 ③C. 19 28

A. ①
B. ②
C. ③

Which of the following statements about hypothesis testing is FALSE()

A. The null hypothesis is a statement about the value of a population parameter.
B. A Type Ⅱ error is failing to reject a false null hypothesis.
C. If the alternative hypothesis is Ha: μ>μ0, a two - tailed test is appropriate.

Which of the following statements about hypothesis testing is most accurate()

A. The probability of a Type I error is equal to the significance level of the test.
B. If you can disprove the null hypothesis, then you have proven the alternative hypothesis.
C. To test the claim that X is greater than zero, the null hypothesis would be Ho : X>0.

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