00:01
Which of these could not be probabilities and why? so what are the requirements for probability? so p, any given probability, has to be between 0 and 1 inclusive.
00:14
Or as percentages, between 0%, impossible to happen, and 100%, certain to happen.
00:24
So as a percentage, it's easier to understand where this is coming from, because it's closer to colloquial usage.
00:29
You say something is 0 % likely if it will never happen, and you can't have something less likely than that, so you cannot have a negative probability.
00:39
And 100 % means it's definitely going to happen.
00:41
And these just are interchangeable with the decimal forms.
00:45
So if we look at these, what about a? a is completely fine.
00:50
It can be a probability.
00:52
It meets this criteria, 0 .65, 65 % likely...