00:01
A friend tells you that in his english class, only five people failed the midterm.
00:07
In his chemistry class, 20 people failed the midterm.
00:12
So could we use the number of students failing the midterm as a measure of the difficulty of the class, or perhaps the toughness of the professor? so it really depends on the size of these classes.
00:23
Classes.
00:23
Imagine if the english class only has 5 people in it, but the chemistry class has 200 people in it.
00:33
Now, the number who fail looks really different.
00:37
In the small english class, all of them failing is obviously catastrophic.
00:41
It looks like a really difficult course.
00:44
In chemistry, it's not as bad...