3.2 Histograms

A histogram is a chart that depicts the frequency of a numerical variable in non-overlapping intervals, called 'bins', that span the entire range of the data. In essence, a histogram is a pictorial representation of a frequency table. While we have used bar charts for categorical variables, a histogram would be the equivalent kind of chart for numerical data. Histograms can be useful because at a glance, we can quickly see the shape of the data. For example, does it look bell-shaped, or does it seem to be skewed to the left or to the right?

Below is a histogram displaying the distribution of heights among the students:

Referring to the histogram above, choose the correct statement below:

The histogram indicates that the distribution of heights is roughly symmetrical (bell-shaped)