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:
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:
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.
A quicker way to find the cumulative frequency is to add the previous cumulative frequency to the frequency of the new value. So for 28 or fewer, add the previous cumulative frequency (6) to the frequency of the new value (5) to get the new cumulative frequency (11). Close Tip