A survey of college students asked them to report their math SAT score, verbal SAT score, whether or not they were vegetarian, their weight, how many credits they were taking, whether or not they had pierced ears, how much money they'd earned the previous year, how much cash they were carrying, and year at school as 1st, 2nd, 3rd, 4th, or "other."
a. Identify all the categorical variables in this data set.
b. Which of these categorical variables has more than two possible values?
c. Use the fact that students with 12 credits or more are considered "full-time" to describe a way to treat credits taken as a categorical variable with just two possible values.
d. Taking the survey respondents to be a sample from a larger population of students, if we report percentages of surveyed students in the various category responses, would these be statistics or parameters?