Baseball players (Introduction) Here is a small part of a data set that describes Major League Baseball players as of opening day of the 2012 season:

Player Team Position Age Height Weight Salary Rodriguez, Alex Yankees Infielder 37 6-3 225 29,000,000 Gonzalez, Adrian Dodgers Infielder 30 6-2 225 21,000,000 Cruz, Nelson Rangers Outfielder 32 6-2 240 5,000,000 Lester, Jon Red Sox Pitcher 28 6-4 240 7,625,000 Strasburg, Stephen Nationals Pitcher 24 6-4 220 3,000,000

(a) What individuals does this data set describe?

(b) In addition to the player’s name, how many variables does the data set contain? Which of these variables are categorical and which are quantitative?