设X~N(μ1,σ21)若P{X-μ11}P{Y-μ21},则必有()A、μ1〈μ2B、μ1〉μ2C、σ1〈σ2D、σ1〉σ2

设X~N(μ1,σ21)若P{X-μ1<1}>P{Y-μ2<1},则必有()

  • A、μ1〈μ2
  • B、μ1〉μ2
  • C、σ1〈σ2
  • D、σ1〉σ2

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