Question

A survey on coffee consumption was conducted among a random sample of students at a university. The results are shown in the table above. Which of the following statements about the students surveyed is NOT supported by the table?

• A. A higher percentage of juniors than sophomores drink 2 or more cups of coffee per day.
• B. A higher percentage of juniors than seniors drink 2 or more cups of coffee per day.
• C. $20\%$ of all students surveyed do not drink coffee.
• D. $50\%$ of the freshmen do not drink coffee.

Answer 1

The correct option is B A higher percentage of juniors than seniors drink 2 or more cups of coffee per day.

% of Juniors drinking $2$ or more coffee$=\frac{50}{66}\times 100=75.75\%$.

% of sophomore drinking $2$ or more coffee $=\frac{26}{50}\times 100=52\%$.

% of seniors drinking $2$ or more coffee $=\frac{32}{34}\times 100=94.11\%$

% of students surveyed do not drink coffee $=\frac{40}{200}\times 100=20\%$.

% of the freshman do not drink coffee $=\frac{25}{50}\times 100=50\%$.

By all the statement, we can see that only statement B is wrong.