00:02
So we have 65 randomly selected car salespersons, and you're asked the number of cars they generally sell.
00:15
So we're going to organize our information into a table, and we're going to have the first column represent the number of cars.
00:26
And then we're going to talk about the frequency, the relative frequency, and the cumulative frequency.
00:47
So when we asked these salespeople, 14 people said that they generally sold three cars, 19 people said they generally sold four cars, 12 salespeople said they generally sell five cars, nine sell six cars, and 11 sold seven cars.
01:22
And when you add up this frequency column, it should be the number of individuals that were in the survey.
01:29
And sure enough, when we add it up, we do get that 65.
01:34
Now, in order to find the relative frequency, it is going to be a comparison of the frequencies in each class to the total number.
01:45
So to find relative frequency, we're doing x divide by n.
01:55
So in this case, there were 14 that sold three out of the 65.
02:04
Now, i'm not 100 % sure on whether your professor or your teacher likes to see the relative frequency written as a fraction, but it is just as good to express it as a decimal.
02:18
So i'm going to express this as it's decimal of 0 .2154.
02:24
And then we're going to do that for each category.
02:27
So the class where four cars were sold, it happened 19 times out of the 65 possible times.
02:39
And as a decimal, that would be 0 .2923...