Consider the following set of stock returns: 12%, 23%, 27%, 10%, 7%, 20%, 15%. The third quartile is（ ）。
The third quartile is calculated as: Ly=(7+1) (75/100)=6. When we order the observations in ascending order: 7%, 10%, 12%, 15%, 20%, 23%, 27%,“23%” is the sixth observation from the left.