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    The vector `problem.1.data` contains numeric data.

    Construct a stipchart of the values in `problem.1.data`. Do you see any evidence of any outliers?

    **Solution**

    Repair this outlier.

    * First, report the location of the outlier.

    * Next, convert the value to `NA`.

    * Finally, display the value of the vector at this location, and show that it has the value `NA`.

    **Solution**

    Construct a stripchart of the repaired version of `problem.1.data`. Do you see any indication of a -9 being used to represent a missing value?

    **Solution**

    It’s not best practice to represent a missing value using the value -9, so we need to repair this.

    * First, report the location of the element with -9.

    * Next, convert the value to `NA`.

    * Finally, display the value of the vector at this location, and show that it has the value `NA`.

    **Solution**

    Construct a stripchart of the repaired version of `problem.1.data`. Do you see any indication of an extreme outlier (i.e. 99999) or a -9 being used to represent a missing value?

    **Solution**

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