# 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.

- Created by: Lottie_Anderson
- Created on: 08-12-12 11:40

First 254 words of the document:

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 equal to that value.

Grouping discrete data

3.) If data is widely spread it should be grouped into classes.

Classes of varying width and open-ended classes

4.) When there is an uneven spread of data across the range, class

intervals may vary in width.

5.) When the extreme values of data are not known, the first and/or last

intervals may be left open.

Two-way tables

6.) A two-way table displays frequencies for two categories of data.

Other tables and databases

7.) A database is an organised collection of information.

8.) A summary table shows data that has been sorted and summarised. It is

easier to interpret than the original data.

Pictograms

9.) A pictogram uses symbols or pictures to present a certain number of

items.

10.) It must have a key to tell you the number of items represented by a

single symbol or picture.

11.) When drawing a pictogram, make sure that;

Each picture is the same size

The picture can be divided easily to show different frequencies

The spacing between the pictures is the same in each row

You give a key

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