Give an example of a discrete random variable.
A)The number of inches of rainfall in a county
B)The number of beverages sold at a lemonade stand
C)The number of gallons of concrete used at a construction site
D)The time required for a runner to finish a marathon
E)The temperature of a pot roast cooking in an oven

Question

Quizplus · Accepted Answer

A discrete random variable is a variable that can only take on a finite or countable number of values. In this case, the number of beverages sold at a lemonade stand can only take on whole number values (i.e. 0, 1, 2, 3, etc.), making it a discrete random variable. The other options are either continuous random variables (A, D, E) or not random variables at all (C).

Give an Example of a Discrete Random Variable