Description: Math Math SAT score Verbal Verbal SAT score Credits Number of credits the student is registered for Year Year in college (1=Freshman, 2=Sophomore, 3=Junior, 4=Senior) Exer Time (in minutes) spent exercising in a typical day Sleep Time (in hours) spent sleeping in a typical day Veg Are you a vegetarian (yes, no, some) Cell Do you own a cell phone (yes, no) Cell Phones College students at a large state university completed a survey about their academic and personal life. Questions ranged from "How many credits are you registered for this semester?" to "Would you define yourself as a vegetarian?" Four sections of an introductory statistics course were chosen at random from all the sections of introductory statistics courses offered at the university in the semester when the survey was conducted, and the 312 students who completed the survey were students registered in one of the four chosen sections. In this exercise, we will use a subset of variables from the survey and use the collected data to answer three questions. Note that (1) these are real data, and (2) the symbol * in the worksheet means that this observation is not available (this is known as a "missing value").