the increasing annual cost (including tuition, room, board, books and fees) to attend college ) to attend college has been widely discussed in many publications including money magazine. the following random samples show the annual cost of attending private and public colleges. data are in thousands of dollars. click on the datafile logo to reference the data. round degrees of freedom to the preceding whole number. private colleges 52.8 43.2 45.0 33.3 44.0 30.6 45.8 37.8 50.5 42.0 public colleges 20.3 22.0 28.2 15.6 24.1 28.5 22.8 25.8 18.5 25.6 14.4 21.8 a. compute the sample mean and sample standard deviation for private and public colleges. round your answers to two decimal places.