We were given a homework problem and for the life of me I cant figure out what in the world to do.

Im not looking for a straight up problem done for me I just need some help..maybe a guide in the right direction.

What I have to do is come up with intervals and the frequency of a group of numbers. I dont understand what this means or how to take care of it.

The numbers and the #of people waiting in a cafeteria line.

The numbers Im given are:

14 1 16 13 11 15 10 7

20 10 11 12 9 10 18 12

13 11 8 17 16 12 14 13

7 20 13 4 11 21 13 11

11 18 3 12 19 11 15 14

I am given that n=40 and k=6, and c=4.

What in the world do I do? I dont even understand what its asking me for.

Thank you for all your help.

-Matt