The most frequently occurring value in a data set is called the
.
The average value in a data set is referred to as the
.
In the set {5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75}, what is the median?
A piano teacher purchases lesson books that are most popular with students. What statistical method is used in this example?