What is PCA ? Random Forest ? Questions on bias / variance, technical precisions on other machine learning concepts. Various exercices: estimate the number of buses that circulate in London in a day; imagine that you have bike stores and various data on sales from past 10 years (sales per store, per bike model) , how can you use machine learning to improve the business model?; imagine that you have a travel agency website, a given destination has various information (price, text, etc) but also images, photos of the place, how can those photos be used to make the recommendation system better?
