00:03
All right, so up here we have four months of bills in 2018 for a heating bill.
00:12
And here we have the same information, but this is in 2019.
00:16
We want to see which year was the mean heating bill higher and by how much.
00:22
All right.
00:22
So to find the mean of a dataset, you need to add up all the points of the data set and then divide by the amount of points there are in the dataset.
00:31
So here we have four different points, 105, 110, 907.
00:36
Okay, so we can see that there are four data points here.
00:40
So we're going to add these up.
00:41
So we need to do 105 plus 110 plus 907.
00:53
All right.
00:55
When we do that, we get 372.
00:58
Now we have to divide 372, divided by four because we have four data points.
01:07
Here.
01:08
We have one, two, three, four...