Official Statistical Examination Level 2 Problem Collection 2017-2019 Officially Certified by the Japan Statistical Society, Corresponding to Statistical Examination Level 3, Data Analysis Officially Certified by the Japan Statistical Society, Corresponding to Statistical Examination Level 2, Fundamentals of Statistics This is a set of 3 books. Although they are old, I studied with these 3 books and passed the Statistical Examination Level 2. There are writings in the problem collection, as shown in the third photo. In addition, both the reference books and problem collections have ○× marks, underlines, and calculation notes, but I have erased them as much as possible with an eraser. There may be faint marks remaining, and there is a possibility that I missed some, so please be aware of this. Please refrain from purchasing if you are concerned about this. There are no noticeable stains or scratches. When shipping, I will waterproof them with plastic and send them in an envelope. Bubble wrap will not be included. No individual sales.