For each of the variables described below, indicate whether it is a quantitative or a categorical (qualitative) variable. Also, indicate the level of measurement for the variable: nominal, ordinal, interval, or ratio. Make sure your responses are the most specific possible.
Variable Type of variable Level of measurement
(a) Duration (in minutes) of a call to a customer support line Quantitative Categorical Nominal Ordinal Interval Ratio
(b) Rating in a consumer magazine (excellent, above average, fair, or poor) Quantitative Categorical Nominal Ordinal Interval Ratio
(c) Voting status (registered or not registered) Quantitative Categorical Nominal Ordinal Interval Ratio

Duration is a quantitative variable, and its level of measurement is interval
Rating is a categorical variable, and its level of measurement is ordinal
Voting status is a categorical variable, and its level of measurement is nominal.

Variable type

A variable whose value is in numbers, is referred to as a quantitative variable; otherwise, it is a categorical variable.

This means that duration is quantitative, while rating and voting status are categorical.

Level of measurement

Nominal variables are named variables; e.g. Yes or No.

Voting status is a nominal variable

Ordinal variables are named and ordered variables, e.g. Excellent, or Very Good or Good, or Fail.

Rating is an ordinal variable

Intervals are named, ordered and are in intervals; e.g. 1 hour to 2 hours.

Duration is an interval variable