00:01
We have two graphs here, and we want to get the correct statement.
00:05
So all of these are regarding the mean.
00:08
The mean is a type of average.
00:11
Now it's not the only type of average, there are a couple of other ones you probably need to know about.
00:16
The median and the mode.
00:19
And they all just measure something different, but they're all measures of an average.
00:24
So the mean is what you would get if you could take every value in your dataset, set, add all of them up to get a sum, and divide by the total.
00:33
So every data point has an equal say in what the average is going to be.
00:37
The median is the halfway point.
00:40
Half of the values will be below it, half above.
00:43
The mode is just the most frequent piece of data.
00:49
So i'll put these to one side.
00:51
The curves you've been given are symmetric, so actually these all take the same value.
00:55
You.
00:56
Let's have a look.
01:01
So i've drawn this line in the middle.
01:03
This is the mean, the median, and the mode.
01:06
Median because half of the curve is to the left, half to the right.
01:09
Mode, it's the peak of the curve, so it's the most frequent.
01:13
Mean because it's also the average.
01:17
So when it's symmetric like that, they're all the same.
01:20
So if we look at the x -axis here, a and b, so a has a mean of 0...