Hands-On Artificial Intelligence for Beginners

The probability space and general theory

When probability is discussed, it's often referred to in terms of the probability of a certain event happening. Is it going to rain? Will the price of apples go up or down? In the context of machine learning, probabilities tell us the likelihood of events such as a comment being classified as positive vs. negative, or whether a fraudulent transaction will happen on a credit card. We measure probability by defining what we refer to as the probability space. A probability space is a measure of how and why of the probabilities of certain events. Probability spaces are defined by three characteristics: 

1. The sample space, which tells us the possible outcomes or a situation 
2. A defined set of events; such ...