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A human resources manager recorded the experience and hourly wage for a sample of technology workers.


Wage ($)

  1. Sketch a scatterplot showing the association between the wage and the years of experience. Describe the association.

  • Create a scatterplot with the -axis labeled "Experience (years)" and the y-axis labeled "Hourly Wage ($)."

    See answer at right. Remember to describe the association.

  1. Sketch the residual plot. Is a linear model appropriate?

  • Refer to the Math Notes box in this lesson to review residual plots.

    Label the -axis "Experience (years)" and the -axis "Hourly Wage ($) as you did with the scatterplot.

    See answer at right. Is the linear model appropriate?
    Why or why not?

  1. What is the correlation coefficient? What does it tell you?

  • Remember that the correlation coefficient, , is a measure of how much or how little data is scattered around the LSRL.

Click the link at right for the full version of the eTool: Int1 4-86 HW eTool