L. Provide a printout in which you nd the mean and standard deviation for tt@75 sizes/mileages of your data set. Descriptive Statistics Variable N Mean SD Mileage 75 16967 7401.6 Also, list your size/mileage for your 20th and your 40th observation below. For all of question 2 treat these values as the mean and standard deviation of the population when answering questions. I SizelMileage for Observation #20: 111052 SizeIMileage for Observation #40: 13459- a. For this problem, assume that the distribution for all sizes/mileages in the population are normally distributed (may not really be true). Find the proportion of all sizes/mileages that would fall between the sizes/mileages of your 20th and 40th observations. To receive full credit, you should include pictures of the normal curve (labeled: with both x and 2- values) with the pertinent probabilities shaded in the picture. Descriptive Statistics Here X Z