Chapter 3 - Section 3.4 - Assess Your Understanding - Applying the Concepts - Page 173: 40

First quartile represents 25% of the data, and 75% of the observations are greater than the value. The second quartile represents 50% of the data, and 50% of the observations are below than or similar to the value and the other 50% are higher than the value. The third quartile represents 75% of the data and 25% of the observations are greater than the value.

Given above.