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If we have a set of data with an odd number of data points then the median is the data point in the middle.
We know that the average after four exams, at four exams, is equal to 84.
Now let's make this a little bit more difficult. I don't know if if I gave myself enough space. I think you're now ready for the average module.
And you probably already intuitively knew that an average is just a number that represents the different values that a group could have. And we can kind of view this, 7.25, as one way to represent these four numbers without having to list these four numbers. We just figured out the average of the first four exams. We add what I got on the fifth exam, and then we divide it by 5, because now we're averaging five exams.
But it can represent that as one number as opposed to giving all the different values. There are other representations you'll learn later on. You'll also the mean, which we'll talk about later, is actually the same thing as the average. And I said that I need to get in an 88 in the class.