Title Subtitle St Chapter 12 2. Consider the following sample data set of student's ages: 10, 12, 15, 10, 9, 16. a) Compute the mean, x-bar, of the data set. Show all work. b) Create the following table in your homework to compute the standard deviation by hand. Remember, x- - 1 . bar is the mean of the sample computed in part a) data x - x_bar (x - x_bar)^2