Y2 Bivariate Data
What
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.
Help
Correlation
For some more background on this look at the scatter graphs information First Year section of the site.You will not be asked to calculate the PMCC from a set of data, but it is advisable to know how this is done using your graphical calculator.Regression lines
You will not be asked to calculate a regression line from a set of data, but it is advisable to know how this is done using your graphical calculator.Interpolation vs Extrapolation
Hypothesis Testing