Indicate the type of variable (numerical or categorical) and the level of measurement of the following data, using the terms nominal, ordinal, interval-ratio, and binary. Note: Identifying the level of measurement of variables helps us select data analysis techniques.

a) We measure children’s heights in centimeters.

b) We identify college students’ weights as Heavy, Medium, and Light.

c) In a study of coronavirus risks, we have classified jobs as essential or nonessential.

d) We ask each respondent to choose their favorite type of whiskey from this list: scotch

(including single malt), bourbon, rye, Irish whiskey, and blended.