A bar chart displays a summary statistic for a categorical variable, such as the mean score of several groups. What term describes this chart?

A bar chart displays a summary statistic for a categorical variable, such as the mean score of several groups. What term describes this chart?

• A. Bar chart
• B. Line charts
• C. Histogram
• D. Scatter plot

Answer: (A)

The main idea is presenting a single summary statistic for each category. When you have several groups and you want to compare a statistic like the mean score across those groups, a bar chart is used: each group is a separate bar, and the bar height reflects the statistic for that group. This is different from a line chart, which is for showing changes or trends over a continuous axis; a histogram, which shows the distribution of a single continuous variable; and a scatter plot, which displays the relationship between two continuous variables. So the described chart is a bar chart.

The main idea is presenting a single summary statistic for each category. When you have several groups and you want to compare a statistic like the mean score across those groups, a bar chart is used: each group is a separate bar, and the bar height reflects the statistic for that group. This is different from a line chart, which is for showing changes or trends over a continuous axis; a histogram, which shows the distribution of a single continuous variable; and a scatter plot, which displays the relationship between two continuous variables. So the described chart is a bar chart.