Y2 Bivariate Data

You have used bivariate data sets at GCSE when working with scatter graphs. At A-Level we look at this topic in more depth. In particular, you will:

• Understand the difference between correlation and causation.

• Understand the meaning of the Product Moment Correlation Coefficient (PMCC) and be able to interpret it in context. 

• To understand the Regression Lines and be able to interpret one to make meaning and make predictions from a set of bivariate data in context.

• Many graphical and non-graphical calculators have functionality that will be invaluable in this topic.

• Perform a hypothesis test on a set of bivariate data to establish whether there is evidence to suggest that there is a correlation between the variables. You should be familiar with the concept of a hypothesis test that you learn in the first year using a Binomial Distribution.

Correlation

PMCC - Intro

PMCC - More

Regression lines

Regression lines - Intro

Interpolation vs Extrapolation

Hypothesis Testing

Introduction

Example 1

Example 2

Example 3 - 2 Tail