Customers of a beauty salon were surveyed to see which type of service they had during their visit (hair, nails, or skin) and their age (18 years or younger or over 18 years old). The results of the survey were displayed in a joint relative frequency table.
Which of the following describes this data set?
Numerical and univariate
Numerical and bivariate
Categorical and univariate
Categorical and bivariate
