00:01
We have a data set.
00:01
It consists of 85 ages of women when they won an oscar for best actress.
00:07
So n, the sample size, is 85.
00:10
In part a, we have a piece of data, 40.
00:14
She's older than 63 of the other actresses.
00:18
What is the percentile for this age? so i'm going to write this as she is the 64th piece of data.
00:26
Data points 1 through 63 are below her.
00:30
What percentile is that? well, the formula for percentile is that the kind of rank of the data is equal to p, the percentile, multiplied by n plus 1 over 100.
00:43
And it's this piece of data.
00:48
So here we have 64th, which means, so n is 85, so we've got 0 .86...