120 Pages

## Walker Maths 3.9 Bivariate Data

### By Charlotte Walker, Victoria Walker | Copyright Year:2017 | ISBN-13: 9780170389419

Published:01/06/2017
Walker Maths is a series of single standard workbooks containing high-quality, up to date material at NCEA Mathematics levels 1, 2 and 3.

The well-designed, write-on workbooks contain teaching material, including relevant formulae, and ample practice exercises along with sample tasks and questions. The workbooks reflect the content and style of the new standards, and allow teachers total flexibility in course design for students at all levels.

As a single standard series, Walker Maths offers Maths department the ability to buy titles all at once, or throughout the year as required.

A Walker Maths Digital Teacher Resource is available for \$9.95 per year for a single download. Each Digital Teacher Resource includes a Walker Maths eBook/projection file. Plus a selection of
• Worksheets
• Extra questions
• Teacher notes
• Videos
• Puzzle sheets
• Practice quizzes
• Worked solutions

### CONTENTS

Glossary

What is statistical inference?

Introduction

Variables

1 Select suitable data
2 Pose an appropriate question
3 Name the response variable and the explanatory variable, and justify your choice
4 State the purpose of your investigation and who would find it useful

Select and use appropriate displays

Identify features in the data

Find a linear model

Describe the nature and strength of the linear relationship, and relate this to the context
1 The nature of the relationship
2 The strength of the relationship

Use the model to make a prediction

Unusual points

Improving the model
1 By removing unusual points
2 By fitting a curve
A Residuals
B Deciding which curve is best

Discuss other features of the relationship
1 Groupings
2 Correlation and causality

Communicate findings in a conclusion

Pick the errors

Putting it all together

Charlotte Walker BEd, GradDipTchLn, MHealSc. Charlotte has nine years' experience in teaching Mathematics, and is currently Assistant HOD of Mathematics and Dean of Year 9 at Darfield High School.

Victoria Walker BSc (Hons), GradDipTchLn.Victoria has twenty years' experience in teaching Mathematics, and is currently 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).

### FEATURES

New, fresh content - right up to date!

Cost effective write-on workbooks for individual standards allows for flexibility in course design.

Rigorous trialling of both text and answers.

Clearly modelled worked examples.

Plenty of practice opportunities.

A high standard of design and production – the clean design allows for plenty of open space and text.