One of the key differences between a bar chart and histogram is:

Question

BlackTom AI · Accepted Answer

In this question, we’re asked to distinguish between a bar chart and a histogram, focusing on their typical use cases.
Option 1: 'the histogram contains gaps between the bars and the bar chart does not' This is a common misconception. In fact, histograms typically have no gaps because adjacent bars represent continuous data; gaps would imply separate categories, which is not standard for histograms.
Option 2: 'a bar chart is used to display a categorical variable and a histogram is used to display the distribution of a quantitative variable' This statement correctly identifies the core difference: bar charts summarize categorical data with discrete categories on one axis, while histograms depict the distribution of a quantitative (continuous) variable by binning values and showing frequencies or densities within those bins.
Option 3: 'the bar chart must be vertical while the histogram must be horizontal' This is incorrect. Both charts can be oriented either vertically or horizontally depending on design choices; orientation is not a defining difference between them.
Option 4: 'the histogram shows relative frequency while the bar chart shows frequency' This is not universally true. Histograms can display frequency or relative frequency (density), and bar charts can display either absolute frequency or relative frequency; the key distinction lies in data type, not the specific measure displayed.
Overall, the most accurate distinction centers on data type and the purpose of the plot: bar charts for categorical data and histograms for the distribution of a quantitative variable.

OSC 2030-009 Fall 2025 Exam 1

One of the key differences between a bar chart and histogram is:

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