What is a histogram used for?

A histogram is a graphical representation that serves the primary purpose of visually depicting the distribution or spread of a dataset. It does this by dividing the data into bins or intervals and then displaying the frequency of data points that fall into each bin as bars. This visualization allows for an easy assessment of how data is distributed across different ranges, revealing patterns such as skewness, modality (e.g., unimodal or bimodal distributions), and potential outliers.

In the context of the other choices, while measuring central tendency (like mean or median) and exploring data correlation are important analytical tasks, they are not the primary focus of a histogram. A histogram does not provide the precise measurements needed for central tendency calculations nor does it directly show relationships or correlations between two variables. Therefore, while other options may relate to important statistical concepts, they do not accurately describe the distinct purpose served by a histogram in data analysis.