Stout General Knowledge Practice Test

A histogram is the visualization that best shows how often data fall into different numeric ranges. It groups data into consecutive intervals, or bins, and uses a bar for each bin with height equal to the count (or density) of observations in that range. Because the bars touch, you can see the full shape of the distribution—the central tendency, spread, skew, and whether there are multiple peaks. This makes it ideal for displaying frequency distributions of a numerical variable. Bar charts are geared toward comparing separate categories, not showing frequencies across a continuum of values. Line graphs highlight changes over time or another ordered sequence. Pie charts illustrate how parts make up a whole, which isn’t suitable for conveying distribution across many numeric values.