Skill: Find the mode

The mode is the value or category that appears most often in a data set. To find it:

1. List the different values.
2. Count how many times each value appears.
3. Identify the value with the greatest frequency, or number of occurrences.

Example: Find the mode of the data set:

$$3,\ 5,\ 2,\ 5,\ 4,\ 3,\ 5,\ 2,\ 5$$

Count each value:

Value	Number of times it appears
$2$	$2$
$3$	$2$
$4$	$1$
$5$	$4$

The greatest frequency is $4$, and the value with a frequency of $4$ is $5$.

Therefore, the mode is:

$$\boxed{5}$$

Remember, the mode is the value that occurs most often, not necessarily the greatest value.