This topic is in the 'Probability and Statistics' section. Probability and Statistics are important ideas, because they are at the heart of making accurate predictions about the world around us. Casinos count on probability theory to make their money, and gambler lose their money often because they misunderstand basic principles of probability. Statistics combined with probability helps people predict weather, understand stock markets, and do a whole host of engineering and other scientific things. Basically it's hard to get by in the world without some knowledge of probability and statistics, and the tutorials in this section will give you a great introduction to the basics!