00:01
So in this question, we have 13 values here.
00:04
And the first thing that we should do, because we want to compute the medium, is to arrange this data in a sending order.
00:14
So it's the same as like just order this number from the smallest to the highest.
00:19
So basic, what we need to do is like the smallest value here is three, and three appears six times.
00:27
Then we have 4, 4, 4, we have 1, 5, 1, 6, and 2, 7th.
00:35
So these are our data that we have.
00:39
And in this case, we have 13 points.
00:42
So the first thing that we need to do is find the mean.
00:45
So the mean here is the sum of all these numbers, so 3 plus 3 plus 3 plus plus until we get to 7 plus 7.
00:58
And then you should divide this by 13.
01:01
If you sum these numbers, you're going to get 5 .5 or 55.
01:05
And if you divide this by 13, you're going to get 4 .23.
01:11
Now, so this will be the value of the mean.
01:15
Now, let's say here that we have this question that says that if the means represents the center of the data.
01:28
So this value here, which is the mean, does this represent the center of the data, is basically means that this value is in the middle of our data when you order them.
01:39
So as you can see, four is like in the middle of this data, right? so you can actually say this, that indeed, the mean represents the center because it is located in the center here.
01:55
And so the right answer for the second question will be letter a.
01:58
Now let's compute the median.
02:01
So the median here has a formula, which depends if the number of observation is odd or even, an even number or a odd number.
02:14
So basically, n here is, in our cases, a odd number, okay? because n is 13, which means that the median here, once you have, like, arranged your data in ascending order, will be the value in the position n plus 1 divided by 2, which in our case would be 14 divided by 2.
02:41
So is the observation in the position number 7.
02:46
So if you go back here, you're going to get like this is in the position 1, 2, 3, 4, 5, 6...