Question

find the mode of this set of data: 18, 9, 11, 6, 12, 9, 13

Explanation:

Step1: Recall mode definition

The mode is the number that appears most frequently in a data - set.

Step2: Count occurrences

18 appears 1 time, 9 appears 2 times, 11 appears 1 time, 6 appears 1 time, 12 appears 1 time, 13 appears 1 time.

Answer:

9