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    IB Math AASL
    /
    Distributions & Random Variables
    /

    Video

    Video Reviews

    Watch comprehensive video reviews for most units, designed for final exam preparation. Each video includes integrated problems you can solve alongside detailed solutions.

    Not your average video:

    Interactive Problems: Solve problems alongside the video with step-by-step guidance and detailed solutions.

    Exam Preparation: Complete unit reviews designed for final exam preparation with all key concepts covered systematically.

    Expert Teaching: High-quality instruction from Perplex co-founder James Mullen with clear explanations, worked examples, and exam tips.

    Not your average video:

    Interactive Problems: Solve problems alongside the video with step-by-step guidance and detailed solutions.

    Exam Preparation: Complete unit reviews designed for final exam preparation with all key concepts covered systematically.

    Expert Teaching: High-quality instruction from Perplex co-founder James Mullen with clear explanations, worked examples, and exam tips.

    Distributions & Random Variables

    Video Reviews

    Watch comprehensive video reviews for Distributions & Random Variables, designed for final exam preparation. Each video includes integrated problems you can solve alongside detailed solutions.

    Not your average video:

    Interactive Problems: Solve problems alongside the video with step-by-step guidance and detailed solutions.

    Exam Preparation: Complete unit reviews designed for final exam preparation with all key concepts covered systematically.

    Expert Teaching: High-quality instruction from Perplex co-founder James Mullen with clear explanations, worked examples, and exam tips.

    Not your average video:

    Interactive Problems: Solve problems alongside the video with step-by-step guidance and detailed solutions.

    Exam Preparation: Complete unit reviews designed for final exam preparation with all key concepts covered systematically.

    Expert Teaching: High-quality instruction from Perplex co-founder James Mullen with clear explanations, worked examples, and exam tips.

    HL

    The video will automatically pause when it reaches a problem.

    The Bell Curve and Standard Deviation

    SL 4.9

    Because of the symmetry of the normal distribution, we know that

    P(X>μ)=P(X<μ)=21​=0.5🚫


    It is also useful (but not often required) to know that:

    P(μ−σ<X<μ+σ)P(μ−2σ<X<μ+2σ)P(μ−3σ<X<μ+3σ)​≈68%≈95%≈99.7%​

    Powered by Desmos

    The Bell Curve and Standard Deviation

    SL 4.9

    Because of the symmetry of the normal distribution, we know that

    P(X>μ)=P(X<μ)=21​=0.5🚫


    It is also useful (but not often required) to know that:

    P(μ−σ<X<μ+σ)P(μ−2σ<X<μ+2σ)P(μ−3σ<X<μ+3σ)​≈68%≈95%≈99.7%​

    Powered by Desmos

    HL