Calculus is the basis of probability theory, and probability theory is the basis of statistics. Therefore, you must learn calculus first, and then start learning probability theory after you have finished calculus and one-dimensional integral. After learning the unary random variable in probability theory, you can start learning mathematical statistics. If you can learn general statistics first, you don't need the foundation of calculus, you can save some time when learning mathematical statistics.

Learning the language of mathematics requires a lot of practice and repeated thinking, so it is undoubtedly difficult to finish these three courses in one month, because according to the arrangement of the school, we will not finish all these contents until the next semester of our sophomore year. Hope to help you, hope to adopt!