Final answer:
The quartiles divide the distribution into quarters.
Step-by-step explanation:
The quartiles are numbers that separate the data into quarters. To find the quartiles, first find the median, or second quartile. The first quartile, Q₁, is the middle value of the lower half of the data, and the third quartile, Q₃, is the middle value of the upper half of the data.
For example, in the given data set: 1, 1, 2, 2, 4, 6, 6.8, 7.2, 8, 8.3, 9, 10, 10, 11.5, the median is 7. The first quartile is 2 and the third quartile is 9.
So, the distribution can be further divided into four parts based on these quartiles.