Question

Below is a list of the number of red lights people sat at on a given day. 5, 6, 12, 15, 15, 17,18, 21, 14, 10, 3, 3Fill in the frequencies for each class. Options may be used more than once.Classes Frequency0-4 Response area5-9 Response area10-14 Response area15-19 Response area20-240 1 2 3 4

Answer 1

Step-by-step explanation

We have a set of values representing the number of red lights people sat at on a given day and we must identify the frequencues of the classes. The frecuency of a class is equal to the number of elements in the set that belong to that class. For example, the frequency of the class 10-14 is equal to the amount of numbers between 10 and 14 that are present in the data set.

To make things easier let's order the numbers in the set from lowest to highest:

`\lbrace3,3,5,6,10,12,14,15,15,17,18,21\rbrace`

Now let's see how many elements we have in each class.

We have the following elements between 0 and 4:

`\lbrace3,3\rbrace`

So the frequency of this class is 2.

Between 5 and 9 we have:

`\lbrace5,6\rbrace`

Then the frequency of the class 5-9 is also 2.

Between 10 and 14 we have these elements:

`\lbrace10,12,14\rbrace`

And the frequency of this class is 3.

Between 15 and 19 we get:

`\lbrace15,15,17,18\rbrace`

So this class has a frequency of 4.

Finally, between 20 and 24 we have:

`\lbrace21\rbrace`

So the frequency is 1.

Answer

So the frequencies of the classes are:

0-4: 2

5-9: 2

10-14: 3

15-19: 4

20-24: 1