問(wèn)題已解決
投資收益率的標(biāo)準(zhǔn)差=[(20%-10%)2×0.3+(10%-10%)2×0.5+(-5%-10%)2×0.2]1/2=0.087。結(jié)果0.087是咋算的,我咋算不對(duì)
溫馨提示:如果以上題目與您遇到的情況不符,可直接提問(wèn),隨時(shí)問(wèn)隨時(shí)答
速問(wèn)速答你好
投資收益率的標(biāo)準(zhǔn)差=[(20%—10%)^2×0.3+(10%-10%)^2×0.5+(-5%-10%)^2×0.2]1/2
=(0.1*0.1*0.3+0+0.15*0.15*02)1/2,用0.0075開(kāi)根號(hào),結(jié)果就是?0.087
2022 07/02 16:18
閱讀 2082