Glossary
Introduction
Revision
Types of variables
Box plots
Shapes of distributions
Use of medians and means
Finding random numbers on a scientific calculator
Finding random numbers on a graphics calculator
Sampling variability
Resampling
The difference between two medians (or means)
Computer program output
Does sample size make a difference?
Setting up your investigation
1 Select suitable data
2 Pose an appropriate question and identify the population
3 Define the variables
4 State the purpose and who would find it useful
Describe and compare sample distributions
Compare the centres
Compare the shapes
Compare the positions, sizes and overlaps of the spreads
Describe any unusual features
Making a formal inference about the difference between the medians
Making a formal inference about the difference between the means
Communicate your findings in a conclusion
Writing about statistical inference
Pick the errors
What is the population?
Putting it all together
Annotated example
Practice tasks
Answers
Data Cards
Removable section in centre of book
Charlotte has over 10 years’ experience in teaching Mathematics, the majority of this as Assistant HOD of Mathematics and Dean of Year 9 at Darfield High School. She has also undertaken a year at St Margaret’s – a high decile, girls’ school. Here she focused on teaching the junior levels (including Year 7 and 8).
Victoria has twenty years’ experience in teaching Mathematics and has recently retired as Teacher of Mathematics and Specialist Classroom Teacher at Riccarton High School. She has received a Jim Campbell award for teaching excellence (2003) and an Ernest Duncan award in Mathematics (2007).
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