00:01
So for this problem, we'll want to first create a table where we have our x values.
00:09
So our x values are negative 3, 1, 4, 7, and 12, as well as we'll want to find the sum of our x values, where i'll just use the symbol sigma for shorthand there.
00:31
The sum of the x values is equal to 21.
00:33
Then we need to do the same for our y values so we have zero six 15 19 27 the sum is 67 then we also need to create a column for x times y so we'll have there zero six 60 133 and 33 and three and three 324 with a total of 523 as well as we want x to the power of 2.
01:19
So our x squared values would be 9, 1, 16, 49, 144, with a sum of 219.
01:36
And lastly, we want to do the same for our y values squared.
01:42
So we'll have 0.
01:45
One second here.
01:48
I'm not sure why it's not letting me right.
01:50
Okay, there we go.
01:51
So we'll have 0, 36, 225, 361, 729, for a total of 1351.
02:06
Now that we have those, we want to find our x bar value, which is going to be the sum of x -21, divided by the number of observations.
02:16
Which is 5, so that's going to be 4 .2, as well as we need to find our y bar value, which is going to be the sum of y, 67, divided by 5, which gives us our average y of 13 .4...