Explore BrainMass

Explore BrainMass

    Scatter diagram

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    I am trying to understand how the regression line "fits" into the scatter plot and how to extract and interpret the data being requested.

    Statistical Problem

    1.

    The following scatterplot shows the miles per gallon for SUVs based on the horsepower of the engines.

    a. Draw the least squares regression line (a straight line) on the scatterplot
    using the eyeball approach. Use the edge of your calculator to insure
    that you have a straight line.
    b. In the space to the right of the graph, sketch the plot of the residuals versus HP.
    Label the "Residuals" on the y-axis and "HP" on the x-axis. The horizontal line is at
    "Residual = 0.0".
    Do not plot all the points; just give a rough idea of what the pattern is.
    Using your line as the estimate of the means, determine the values of
    maximum positive residual and the maximum negative residual and scale
    the y-axis accordingly. Your values can be approximate; just get in the ballpark.
    c. Based on this plot, what transformation of the Y variable
    would you recommend using for the next step of the analysis?

    © BrainMass Inc. brainmass.com June 3, 2020, 8:39 pm ad1c9bdddf
    https://brainmass.com/statistics/scatter-plot/interpreting-scatter-plot-data-147422

    Attachments

    Solution Preview

    Please see the attachments

    Statistical Problem
    1. The following scatter plot shows the miles per gallon for SUVs based on the horsepower of the engines.

    a). Draw the least squares regression line (a straight line) on the scatter plot using the eyeball approach. Use the edge of your calculator to insure ...

    Solution Summary

    This solution gives the step by step method for analyzing data using scatter diagram.

    $2.19

    ADVERTISEMENT