Session 2, Part C:
Frequency Tables

In This Part: Making a Table | Cumulative Frequencies | Another Method
Intervals and Ranges

Here is another way that you could use either the line plot or the frequency table to obtain the cumulative frequencies. Look at the number of boxes with 25 or fewer raisins, which are highlighted in red on both the line plot and the frequency table:

Raisin Count

Frequency

 25 1 26 2 27 3 28 5 29 4 30 1 31 1

There is one box with 25 or fewer raisins.

Now look at the number of boxes with 26 or fewer raisins, highlighted in green on the line plot and the frequency table:

Raisin Count

Frequency

 25 1 26 2 27 3 28 5 29 4 30 1 31 1

There are three boxes with 26 or fewer raisins.

Problem C7

You can add a third column to the table to indicate cumulative frewquencies. Use the line plot or the frequency table to complete the cumulative frequency values.

Raisin Count

Frequency

Cumulative Frequency

 25 1 1 26 2 3 27 3 28 5 29 4 30 1 31 1

Raisin Count

Frequency

Cumulative Frequency

 25 1 1 26 2 3 27 3 6 28 5 11 29 4 15 30 1 16 31 1 17