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Numeracy Skills
Table of Contents
Using averages
Introduction
Part one: The Mean
Part two: The Median
Part three: The Mode
Working with percentages
Introduction
Using percentages to compare information
Calculating percentage change
Calculating percentage increase or reductions
Summary
Measures of variability: the range, inter-quartile range and standard deviation
Introduction
The Range
The Inter-quartile Range
Calculating the Inter-quartile range using Excel
The Standard Deviation
Population and sample standard deviations
Formulae for the standard deviation
Calculating the standard deviation using Excel
Summary
Presenting numerical data
Introduction
Including numbers in the main body of text
Presenting numbers in tables
When to use tables
Table design
Examples of poor and better practice in the presentation of data in tables
Graphs
Types of Graph
Bar charts
Histograms
Pie charts
Line graphs
Scatter plots
Good graph design
Components of a graph
Chart area
Reference to source of information
Other design considerations
Use of colour and shading
3D effects
Summary
Bar charts
What is a bar chart?
What types of data can be displayed using a bar chart?
Different types of bar charts
Histograms
What are histograms?
Grouping data in a histogram
Pie charts
What is a pie chart?
What data can be presented using a pie chart?
Design issues
Comparing pie charts
3D effects and exploding pie charts