2 - Week One Problem Sets and SAS Exercises Problem 1 A study is run to estimate the mean total cholesterol level in children 2 to 6 years of age. A sample of 9 participants is selected and their total cholesterol levels are measured as follows: 185 240 196 175 180 194 147 223 a) Compute the sample mean b) Compute the sample standard deviation c) Compute the median d) Compute the first and third quartiles