00:01
So in this problem, we have some incomplete data about 80 part -time students, and they were asked how many courses they were taking this term.
00:08
So the first thing we want to do is we want to fill in all the parts of this, and the first missing piece is about relative frequency.
00:18
And we, again, we know that there are a total of 80 individuals in this study, and we want to know what part of the 80 are, taking only one course.
00:32
So there are 36 out of the 80 taking one course.
00:36
That is the same as saying 9 out of 20, which is the same as saying 0 .45.
00:45
And that's where they got the 30.
00:47
There were 24 taking two courses out of the 80, which was the same as 6 out of 20 or 3 out of 10.
00:58
And that's where the 0 .30 came from and doing the same thing for the three courses.
01:04
It's 20 out of 80, which is the same thing as one -fourth or 0 .25...