It is important to distinguish two types of numerical data.

Discrete data
When the values in the batch are whole numbers (counts), the data set is called discrete.
Continuous data
When the data are not constrained to be whole numbers, the data set is called continuous.

Dot plots for counts

Dot plots can be used to display count data. However since discrete values are often repeated several times in a data set, the crosses need to be jittered or, preferably, stacked.

If there is a stack for each integer value, the stacked dot plot is a complete representation of the data.