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    IB Math AASL
    /
    Descriptive Statistics
    /

    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.

    Descriptive Statistics

    Video Reviews

    Watch comprehensive video reviews for Descriptive Statistics, 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.

    Data & SamplesMeasuresVisualsRegression

    The video will automatically pause when it reaches a problem.

    Regression line x on y

    SL 4.10

    In the same way that we can plot a straight line minimizing the vertical distances from points (x,y), we can plot a straight line minimizing the horizontal distances. This is called an x on y regression line.


    Powered by Desmos


    With this line we can make reliable predictions of x given y, so long as we are not extrpolating.


    Example

    Find the x on y regression line for the following data, and hence predict x when y=14.

    x

    3

    4

    5

    6

    y

    8

    12

    16

    17

    Using a calculator (putting the y-values in the Xlist and x-values in the Ylist) we find

    x=0.305y+0.453


    Plugging in y=14, we find x=4.72 (or 4.73 is you use exact values).

    Regression line x on y

    SL 4.10

    In the same way that we can plot a straight line minimizing the vertical distances from points (x,y), we can plot a straight line minimizing the horizontal distances. This is called an x on y regression line.


    Powered by Desmos


    With this line we can make reliable predictions of x given y, so long as we are not extrpolating.


    Example

    Find the x on y regression line for the following data, and hence predict x when y=14.

    x

    3

    4

    5

    6

    y

    8

    12

    16

    17

    Using a calculator (putting the y-values in the Xlist and x-values in the Ylist) we find

    x=0.305y+0.453


    Plugging in y=14, we find x=4.72 (or 4.73 is you use exact values).

    Data & SamplesMeasuresVisualsRegression