Instruct: Classify Amazon reviews into positive or negative sentiment
Query: too much proof, too little application, hard to read!!!!

I used this book for my statistics class. The author makes simple concept hard to understand. It contains pages of proofs to a simple formula. I tried to follow the proof, but it was confusing. The proofs were not basic and intuitive calculus. It did not help me do well in the class either. I almost forgot what I was trying to prove when I followed through.The book does not explain how to use the formulas. So, the problem sets are hard, because you are not sure how to apply the formulas.A lot of the later examples are based on the result of the earlier ones. So, it can be very hard to pick up from the middle of the book. It also happens in the problem set, the result from question 1 is needed to complete question four.