00:01
So they give us some data for the weight of newborn babies.
00:03
I've gone ahead and listed them in numerical order because that's the first thing you have to do.
00:08
What is the weight that corresponds to the 25th percentile? we want to know the median, which is actually the 50th percentile, and then we want to know the percentile that corresponds to the weight of 8 .2 pounds.
00:23
So let's start with the percentiles.
00:25
Let's just start with 50th.
00:27
50th means we want the one in the middle.
00:29
50 % are going to be below, 50 % above.
00:33
So we're looking in the middle.
00:35
Since we have 15 items, then we're going to need to have 15, divide that by 2.
00:41
That's going to be 7 .5.
00:43
That means we want 7 before and 7 after.
00:47
So i'll go 1, 2, 3, 4, 6, 7.
00:50
1, 2, 3, 4, 6, 7.
00:53
So my median is going to be 7 .4.
00:58
So now let's look at the 25th percentile...