00:01
This problem asks which of the following correlation coefficients represents the strongest association between two variables, and we're given four values for the choices, negative 0 .45, 0 .90, negative 0 .50, and negative 0 .95.
00:15
And then a very easy thing to do on accident is to see that we have 0 .90 and say that's the strongest, because that's the biggest positive value we see.
00:23
For correlation coefficients, it's not necessarily the biggest value.
00:28
You, it's the value that's closest to either 1 or negative 1.
00:31
So if we think of it as a number line with 0 right in the middle, and we have negative 1 here and positive 1 here, if it's close to negative 1 or close to positive 1, it implies a strong correlation.
00:44
The only difference is if it's closer to negative 1, that's a negative correlation, which means as an x value goes up, a y value goes down, or vice versa...