Actually, it's for preparation. From the point of view of learning, it is to learn probability statistics better in the future. In the long run, all engineering-related majors are in great need, which will be known in the later production time. For example, mechanical design, first of all, to calculate the strength, life, reliability and performance of machinery, requires mathematical analysis. First of all, we should use mathematical knowledge, such as statistical knowledge, interest calculation of snowballing usury and so on. Learning mathematics can improve people's IQ and thinking ability.