Question

Exit Ticket

At a large university, students are allowed to register for no more than 7 classes. The number of classes for which a
student is registered is a discrete random variable. The expected value of this random variable for students at this
university is 4.15.
Write an interpretation of this expected value.

Answer 1

If you asked a lot of students from this particular university how many classes they are registered for, the average of classes will be 4.15.

Explanation:

The expected value is the average of the discrete random variable in the long run. If an event occurs many, many times the average value of the outcomes gets closer to the expected value, and when the sample is big you get the expected value.