用同学2022-05-19 21:06:16
老师,“On a random draw, the probability of choosing a stock of a particular industry from the S&P 500.” 这里面哪里有逻辑推断的影子?
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Evian, CFA2022-05-19 23:21:24
ヾ(◍°∇°◍)ノ゙你好同学,
C:
On a random draw, the probability of choosing a stock of a particular industry from the S&P 500.
解析:
A priori probability is based on formal reasoning and inspection. Given the number of stocks in the airline industry in the S&P500 for example, the a priori probability of selecting an airline stock would be that number divided by 500.
解析的意思是说C正确。S&P500里有500只股票,如果S&P500包含航空行业的X只股票(Given the number of stocks in the airline industry )那么在S&P500中随机抽一只股票,这只股票属于航空行业的概率是X/500
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