A survey of Statistics students includes information on their age, college major, expected salary after graduation, and their Social Security number. Who are the individuals, what are the categorical variables, and what are the quantitative variables?
A) The individuals are ‘Statistics students.' The only categorical variable is college major. The quantitative variables are age, expected salary after graduation, and Social Security number.
B) The individuals are ‘Statistics students.' The categorical variables are college major and Social Security number. The quantitative variables are age and expected salary after graduation.
C) The individuals are ‘Statistics students.' The categorical variables are age, college major, and Social Security number. The only quantitative variable is expected salary after graduation.
D) The individuals are age, college major, expected salary after graduation, and Social Security number. The variables are ‘Statistics students.