The statistical qualification certificate is very simple, the book is too detailed, and the exam is not so deep. It is best to look at the real questions over the years. If you can understand them basically and the repetition rate is very high, about 80%. The key is only multiple choice questions and true or false questions. I took the exam last year and didn't attend the training either. I read books and questions at home for three days just before the exam. The books were at the bottom three days ago, and I didn't care if I heard that it was quite simple. But don't take it too lightly. Try to see it when you have time. You have a better chance of winning. I wish you good grades in the exam.