00:01
So for this problem, we're considering different possible values of r, the correlation coefficient.
00:06
Now, with r, it basically gives us two different bits of information that we can read out in the following way.
00:14
We can think of the magnitude of r.
00:17
So that's basically we just take off the sign in front.
00:20
We don't care if it's positive or negative.
00:23
We just care about the magnitude of r.
00:24
The magnitude of r gives us, or i need to be consistent here.
00:28
I was writing this as capital r.
00:29
The magnitude of r gives the strength of the relation.
00:42
So if we have that the magnitude of r is close to 1, then it doesn't matter if it's positive or negative.
00:52
That is a very strong relation.
00:59
And if the magnitude of r is close to 0, then it is a very weak relation.
01:15
The second thing that we can get from the correlation coefficient is, the sign of r.
01:26
If the sign of r is less than zero, or in other words, if r itself is a negative number, then that tells us that that is a negative relation...