在備考CFA是會(huì)遇到許多的知識點(diǎn)不懂,等把知識點(diǎn)學(xué)完后,將知識點(diǎn)運(yùn)動(dòng)到做題上還是會(huì)出現(xiàn)各種各樣的問題,不是說知識學(xué)會(huì)了就行還是要將它運(yùn)用起來,在CFA一級數(shù)量分析中好多生對下列考題不懂,今天就來說說!
A group of investors wants to be sure to always earn at least a 5% rate of return on their investments. They are looking at an investment that has a normally distributed probability distribution with an expected rate of return of 10% and a standard deviation of 5%. The probability of meeting or exceeding the investors' desired return in any given year is closest to:___
分析:
期望值減去1倍標(biāo)準(zhǔn)差剛好就是要求的*收益率5%,達(dá)到或超過5%的概率就是收益率超過期望值減去1倍標(biāo)準(zhǔn)差的概率。正態(tài)分布,收益率介于期望值減去1倍標(biāo)準(zhǔn)差到期望值加上1倍標(biāo)準(zhǔn)差的這個(gè)區(qū)間的概率是68%,再加上右邊尾巴的面積(1-68%)/2=16%,期望值減去1倍標(biāo)準(zhǔn)差右邊的面積(概率)就是68%+16%=84%
所以在備考的時(shí)候知識學(xué)懂是首先的一步,接下來就是將學(xué)的知識運(yùn)用到做題上,想要拿到證書是要通過考試的,如果你在學(xué)習(xí)上有什么困難的話,可以咨詢!