The total scores on the Medical College Admission Test (MCAT) follow a Normal distribution with mean 25.2 and standard deviation 6.9. (a) What are the median and the first and third quartiles of the MCAT scores? (Enter your median to one decimal place. Round your quartiles to the nearest whole number.)

(a) What proportion of students taking the MCAT had a score over 31?


(b) What proportion had a score between 21 and 24?