A random variable which takes on no more than a countable number of values is called a(n):
A) continuous random variable.
B) outcome.
C) statistic.
D) discrete random variable.
Question 2
Which one of the values below represents a lower quartile for the data set 23, 24, 21, and 20?
A) 22.0
B) 22.5
C) 20.25
D) 23.5