The bar plot and the pie chart below show the distribution of pre$-$existing medical conditions of children involved in a study on the optimal duration of antibiotic use in treatment of tracheitis, which is an upper respiratory infection.

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$($a$)$ What features are apparent in the bar plot but not in the pie chart?

Answer: In the bar chart you can easily see whether a value is

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the others.

$($b$)$ What features are apparent in the pie chart but not in the bar plot?

Answer: In a pie chart, in general there are

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features that are easier to say than they would be in a bar chart $($in order words, a pie chart is

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than a bar chart$).$

$($c$)$ Which graph is better to use for displaying these categorical data?

Answer:

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