For each of the following variables, determine whether the variable is categorical (qualitative) or numerical. If the variable is numerical, determine whether the variable is discrete or continuous. a. The number of stores a person visited in the past month b. A person's preferred brand of coffee c. The duration of a car trip a. The number of stores a person visited in the past month is what kind of variable? Continuous numerical Qualitative O Discrete numerical What is the measurement scale? O ordinal O ratio interval O nominal b. A person's preferred brand of coffee is what kind of variable? O Continuous numerical O Qualitative O Discrete numerical What is the measurement scale? O interval O ordinal O ratio O nominal c. The duration of a car trip is what kind of variable? O Qualitative O Discrete numerical O Continuous numerical What is the measurement scale? O ratio O nominal O ordinal O interval