Which chart is best for showing the distribution of a continuous variable?

Which chart is best for showing the distribution of a continuous variable?

• A. Histogram
• B. Bar Chart
• C. Pie Chart
• D. Line Chart

Answer: (A)

To understand how a continuous variable is distributed, you look at how the values spread across the range, where they cluster, and whether the shape is symmetric, skewed, or has multiple peaks. A histogram does this best because it bins the data into intervals along the horizontal axis and shows how many observations fall into each interval with bars of varying height. This visualization reveals the overall distribution shape, including spread, central tendency, skewness, and potential outliers, in a single glance. The bin width can affect what you see, so choosing a reasonable number of bins helps uncover the true pattern. Other charts don’t show this distribution shape as clearly: a bar chart compares categories, a pie chart shows parts of a whole for categories, and a line chart emphasizes changes over time or ordered sequences.

To understand how a continuous variable is distributed, you look at how the values spread across the range, where they cluster, and whether the shape is symmetric, skewed, or has multiple peaks. A histogram does this best because it bins the data into intervals along the horizontal axis and shows how many observations fall into each interval with bars of varying height. This visualization reveals the overall distribution shape, including spread, central tendency, skewness, and potential outliers, in a single glance. The bin width can affect what you see, so choosing a reasonable number of bins helps uncover the true pattern. Other charts don’t show this distribution shape as clearly: a bar chart compares categories, a pie chart shows parts of a whole for categories, and a line chart emphasizes changes over time or ordered sequences.