00:01
Here on this problem, we've been given a list of given values.
00:04
We want to identify if it is a discrete random variable, continuous random variable, or not a random variable at all.
00:12
Now on a, we have grades of a, b, c, d, and f.
00:15
Now, because there are a countable number of values that it can take on, that tells us that this has to be discrete.
00:23
A discrete random variable is whenever it can take on a countable number of values.
00:28
And then a continuous random variable is whenever it can take on an infinite number of values.
00:33
Like on b, we have the heights of students.
00:36
Well, each student's height, even if they're pretty close, will never be exactly the same.
00:41
And so because that can vary infinitely, that is what is called a continuous random variable...