Data Visualization

Continuous variables are usually a number in any form that can be measured
Categorical variables are usually a text, that ditto categorizes.

Histograms

Histograms are a type of plot that takes one continuous variable as its input. It allows you to answer questions about the shape of that variable’s distribution. For example, you might want to know the lowest and highest values, and which values are most common.

“Binwidth” refers to the width of each bin in a histogram or a frequency distribution. It determines how data points are grouped into intervals.
For example, if you’re making a histogram of people’s ages and you set a binwidth of 5, the bins would cover ranges like 0-4, 5-9, 10-14, and so on.