At the beginning of the season, a soccer coach gave his players a fitness test. He recorded data on the number of sit-ups his players could complete in 1 min: Luke 31, Jacques 26, Tommy 18, Tay 54, Sam 27, Armando 24, Jon 25, David 32, Chris 23, Diego 26, Nate 30, and Dimitri 32. (a) Calculate the mean, and compare the value of the mean to the median. Show your work. (b) Which measure of center—mean or median—is better for describing the data? Explain. (c) How would the mean change if the outlier were not included? Show your work.