GCSE Statistics Chapter 2 Summary- Representing and Processing Qualitative and Discrete Data

After completing this chapter, you will be able to;

  • Construct tally charts, frequency tables and cumulative frequency tables
  • Group data into classes including classes of varying width and open ended classes
  • Construct two-way tables
  • Read and interpret data presented in tabular or graphic form
  • Construct, draw, use and understand pictograms, bar charts including multiple and composite bar charts, vertical line graphs, stem and leaf diagrams, pie charts and comparative pie charts.
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Page 1

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Tally charts and frequency tables


1.) A tally chart or frequency table can be used to process raw data. They
make it easier to spot patterns.

Cumulative frequency tables

2.) The cumulative frequency of the value of a variable is the total number
of observations that are less than or…

Page 2

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Bar Charts
12.) In a bar chart, bars of equal width are drawn for each category or
quantity.

13.) The length of a bar is equal to the frequency of the category it
represents.

14.) The gaps between bars must be of equal width.

Vertical line graphs

15.) A vertical…

Page 3

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Where r1 = radius of first circle
r2 = radius of second circle
F1 = total frequency of the first data set
F2 = total frequency of the second data set

26.) To compare the total frequencies, compare the areas.

27.) To compare proportions, compare the individual angles.



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