Mathematics for IGCSE & O level - Statistical Diagrams (Section 1 - No. 19)

Which of the following is NOT a step in creating a cumulative frequency diagram?

Creating a frequency table

Calculating the cumulative frequencies

Plotting the cumulative frequencies against the upper boundaries of the class intervals

Drawing a line of best fit through the midpoints of the bars.

Drawing a line of best fit is not used for cumulative frequency diagrams.