What does a Histogram typically display on its horizontal axis?

A histogram typically displays the class intervals on its horizontal axis. Class intervals are the ranges of values into which the data is organized; they effectively categorize the data into groups. Each bar in the histogram represents one of these intervals, illustrating how many data points fall within each range. This organization helps in visualizing the distribution of the data, revealing patterns, trends, and any potential outliers.

The frequencies of different classes are actually represented by the height of the bars in the histogram, rather than on the horizontal axis. Similarly, the total number of data points is not shown directly on the horizontal axis but may be inferred from the overall heights of the bars. Relative frequency, which indicates the proportion of the total data represented by each bar, is generally displayed on the vertical axis, not the horizontal one. Thus, the correct answer emphasizes the role of the horizontal axis in depicting the structure of the data bins or intervals.