Identify the steps to finding quartiles.
Step 1. Arrange the data in increasing order.
Step 2. Determine the median, M, or second quartile, Q2.
Step 3. Divide the data set into halves: the observation below (to the left of) M and the observatin above M. The first quartile, Q1, is the median of the bottom half and the third quartile, Q3, is the median of the top half.