• 2021-04-14 问题

    设X~N(0,1), 则~https://img-ph-mirror.nosdn.127.net/TT4ltesSjkpnEONpdc6Ghw==/6630742310257073475.pnghttps://img-ph-mirror.nosdn.127.net/ESca9jDZvvCRBMiHX_UYkA==/6630658747374203114.png

    设X~N(0,1), 则~https://img-ph-mirror.nosdn.127.net/TT4ltesSjkpnEONpdc6Ghw==/6630742310257073475.pnghttps://img-ph-mirror.nosdn.127.net/ESca9jDZvvCRBMiHX_UYkA==/6630658747374203114.png

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