What does a histogram display?

A histogram functions as a graphical representation that displays the distribution of data points across defined ranges, also known as bins. This visualization allows users to see how frequently each value or range of values occurs in a data set, providing insight into the underlying distribution, central tendency, and variability.

By categorizing continuous data into discrete intervals, histograms effectively illustrate the shape of the data distribution. This can reveal patterns such as skewness, modality (unimodal, bimodal, etc.), and the presence of outliers. Therefore, answer B accurately describes the primary purpose of a histogram, showcasing its utility in analyzing and interpreting data distributions in a straightforward manner.

On the other hand, while correlation between two variables is displayed by scatter plots, the flow of a process is typically represented through process flow diagrams, and the number of defects over time can be illustrated with control charts. None of these options capture the essence of what a histogram specifically conveys about data distributions.