00:01
In exercise 6, we are trying to distinguish between discrete and continuous random variables, and we're given a few different situations, and we're asked to identify if we have discrete or continuous random variables in each situation.
00:13
So let's look at a.
00:14
A says the cost of conducting a genetics experiment.
00:19
So the idea that i teach is discrete random variables are often countable.
00:26
It's not the only definition.
00:28
There's also a definition that says that we have clear gaps.
00:33
There's a few different ways you can think about it, but i have my students think about this as countable and continuous to be measurable.
00:47
So looking at a, the cost of conducting a genetics experiment.
00:53
So this is money.
00:55
Think about coins, think about dollars.
00:56
You can count that.
00:58
There's clear gaps, meaning that we can have a dollar and 35 cents and we can have a dollar and 36 cents.
01:04
But we can't have anything between $1 .35 and $1 .36.
01:08
So we have a gap between those two numbers...