00:01
Hey there, welcome to numerate.
00:02
We're asked to calculate the correlation coefficient for this following set of data here.
00:09
So let's do it here.
00:11
So our equation over here would be r for a correlation coefficient equals the sum of products divided by the square root of the sum of squares of x times the sum of squares of y s -s -x times ssy.
00:34
That's the equation we're going to use to find the piercing correlation coefficient.
00:39
So let's find the means first.
00:42
We need the means in order to find the sum of products and sum of squares.
00:47
So our mean of x, you're going to take the sum of all the x values and divided by the total number of values here.
01:00
So we will get, let me see how many values we have.
01:03
We have 1, 2, 3, 5, 6, 7, 8, 9.
01:06
Let me count again, 3, 6, 9.
01:09
All right.
01:10
So we're going to have 9.
01:11
So we divide by 9, and we should get an x mean of around 13 .3...