Mitchell came to study in London. Which of the following activities of his could be considered a statistical survey?
Mitchell asked some friends and relatives about the eating habits of Londoners.
Mitchell interviewed a doctor to find out more about textbooks on high blood sugar.
Mitchell conducted a survey among 1,421 students of the Faculty of Arts to find out the kind of food the students eat at their refectory.
Mitchell asked 30 college classmates how much milk they drink per day.
