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Exercise

Visualizing with box plots

With our subsetting tools in hand, let's return to the task of the day: making basic summaries of the BRFSS questionnaire.

You already looked at categorical data such as smoke100 and gender so now let's turn our attention to numerical data. A common way to visualize numerical data is with a box plot.

To construct a box plot for a single variable, you use the boxplot() function. Example: boxplot(cdc$weight).

Instructions

100 XP
  • Draw a box plot of height using the boxplot() function.
  • Use the summary() function to also get a numerical summary of the variable.
  • Compare the two results.