A magazine conducted a survey where they wished to understand the average class size of first year courses at a local community college. They randomly selected 17 first year classes and obtained the following numbers. (a) Are we dealing with a sample or a population? (b) Determine the mean, median, 5% trimmed mean, and 10% trimmed mean. (c) Why is it appropriate to use trimmed means in this situation? (d) If this data set was comprised of 78 data points and we wanted to calculate a 5% trimmed mean, how many data points would be dropped from the bottom and top of the data set?.