Had a question sent in by Monica, who wanted to know about data transformations, and linearising data. So in this video I go over a run down of what data transformations are all about and then answer the textbook question which is from Maths Quest, Chapter 3F, Question 2. Thanks for the question Monica! Here’s [...]

As promised a couple of days ago, today’s video has some more information about linear regression using the three median method. To start from the beginning and learn about this method of regression, watch Tutorial 21. Today’s video doesn’t explain the steps (as I did this in the last tute) but gives you a bit [...]

Finding a linear regression line using the three median method seems a bit finicky and tricky when you first start doing it. But break it down into the steps, and it becomes much clearer. This tutorial explains each step slowly, so once you’ve watched this through you should be a pro at this method of [...]

Today’s tutorial gives you an introduction to regression. I’ll explain briefly what it is, and the three methods for linear regression that we use in further maths; bye eye, using the 3 median method, and using the least squares method. The tute then runs through the simplest of those methods, plotting a linear regression line [...]

Pearson’ product-moment correlation coefficient is the “r” value we associate with data distributions. It’s a measure of how well two variables correlate to one another — how strong the relationship is, how much they affect one another. For example, your height has an effect on your weight (the taller someone is, the more they weigh [...]

So… scatterplots. These are a fairly large part of the core (data analysis) section of the further maths course. You need to understand these babies before you can move on to regression, residual analysis, transformations and all that fun stuff. So I’m starting with the foundations and we’ll build up from there. This video starts [...]