有关统计学的英语题As given on the Morningstar website,the mean return for _英语解答

有关统计学的英语题
As given on the Morningstar website,the mean return for Fidelity Leveraged Company Stock is 17.98 percent with a standard deviation of 10.02 percent,while the mean return for Baron Opportunity Retail Stock is 16.43 percent with a standard deviation of 12.23 percent.Which stock do you buy?(Which is riskier than the other one?)
请翻译一下题目所讲的内容,并用英语回答该问题,

人气：386 ℃　时间：2020-02-05 02:42:42

解答

像morningstar 网站上写的那样,FL公司股票的平均回报是17.98%,标准差10.02%.BOR公司股票的平均回报16.43%,标准差12.23%.你会买那个股票?（哪个更加有风险?）解法的话应该是用变异系数（coefficient of variation）,...我好像还没有学过变异系数那看你学了什么呗。反正题目只给这2个参数。。我是不记得还有什么了。