Fresh up your knowledge about statistics using this presentation. It discusses topics like the correlation analysis, how to use R for correlations, different correlation coefficients and partial correlation. But why should correlation be interesting? Imagine you have created a TV-advertisement for an already existing sport drink called "BLUECOW" and your boss is asking you if your spot benefits the numbers of sold drinks. How can you find out if it does or if it’s crap? The answer is: You measure the correlation between the adverts and the numbers of sold drinks.