• 2022-07-23
    随机变量X服从正态分布N(2, 4),其概率密度f(x) = ( ).
    A: [img=191x60]1802f2c48daf2cd.png[/img]
    B: [img=220x63]1802f2c497e7d97.png[/img]
    C: [img=221x63]1802f2c4a2253a6.png[/img]
    D: [img=212x57]1802f2c4acda7d1.png[/img]
  • 举一反三