Hints and Tips Be sure to determine what type of random variable the problem requires you to use. Then, identify the parameters you need (n, p for binomial, etc). Then, determine what is being asked. Finally, open Excel and make your computations. The ratio of time spent thinking to time spent doing should be at least 3 to 1! This may be the hardest assignment in IE 8510. But, it is very important for later courses, like IE 8530. | Questions to answer 1. Suppose it is known that the size of courses across all sections, departments, levels, etc at Clemson University is approximately normal with mean 22.1 and standard deviation 4.5 (FYI: the standard deviation value is not accurate). a. What is the probability that a randomly selected course has 22 or fewer students? b. What is the probability that a randomly selected course has between 17 and 26 students? c. What is the probability that a randomly selected course has more than 26 students? d. Find the course size such that 75% of all courses have at least this many students. e. Find the course size such that 80% of all courses have at most this many students. f. Find two course sizes, equidistant from the mean of 22.1, such that 90% of all courses are between these values.