Cumulative Frequency Graph Concepts

The video tutorial explains how to create and plot a cumulative frequency graph. It begins with adding a running total to the frequency table, labeling it as cumulative frequency. The tutorial then guides on plotting the cumulative frequency at the maximum of each group on the graph, starting from zero. It discusses the choice between using curves or straight lines to connect points, noting that both methods are acceptable in mark schemes. The key takeaway is the importance of plotting at the maximum of each group for cumulative frequency.

What is the first step in creating a cumulative frequency graph?

• Plotting the points on the graph

• Adding a running total to the frequency table

• Calculating the mean

• Drawing a curve

What is another name for the running total added to the frequency table?

• Mean frequency

• Cumulative frequency

• Median frequency

• Mode frequency

How do you calculate the cumulative frequency?

• By adding frequencies sequentially

• By multiplying frequencies

• By dividing frequencies

• By subtracting frequencies

If the initial frequency is 10 and the next frequency is 25, what is the cumulative frequency?

• 25

• 15

• 35

• 50

What is the cumulative frequency if you add 15 to a previous cumulative frequency of 35?

• 45

• 40

• 60

• 50

What is the cumulative frequency if you start with 10 and add 25?

• 30

• 35

• 20

• 40

What is the cumulative frequency if you add 25 to an initial frequency of 10?

• 15

• 25

• 35

• 45

Where do you start plotting on a cumulative frequency graph?

• At the mean

• At zero

• At the median

• At the mode

What should you be careful about when starting to plot on a cumulative frequency graph?

• Always starting at zero

• Starting at the mode

• Starting at the mean

• Starting at the median

At what point do you plot the cumulative frequency for each group?

• At the minimum of each group

• At the mean of each group

• At the maximum of each group

• At the median of each group