Averages and Probability: example 5.54

The ages of students in a college math class are listed below. Identify the mode.

$18, 18, 18, 18, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 21, 21, 22, 22, 22, 22, 22, 23, 24, 24, 25, 29, 30, 40, 44$

Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.

Solution
The ages are already listed in order. We will make a table of frequencies to help identify the age with the highest frequency.

Now look for the highest frequency. The highest frequency is $7,$ which corresponds to the age $20 .$ So the mode of the ages in this class is $20$ years.

Your turn

The book's Try It right after this example: same idea, new numbers. Only the answer is given.

The number of sick days employees used last year: $3, 6, 2, 3, 7, 5, 6, 2, 4, 2 .$ Identify the mode.

How did it go?