How much do you study? A survey among freshmen at a certain university revealed that the number of hours spent studying the week before nal exams was normally distributed with mean so and standard deviation 3. Use the TI-34 PLUS calculator to answer the following. Round the answer to at least four decimal places. (a) What proportion of students studied more than 45 hours? (b) What is the probability that a randomly selected student spent between 1'! and 3? hours studying? (c) What proportion of students studied less than 3? hours? Familia- Part10l'3 What proportion of students studied more than 45 hours? The proportion of students who studied more than 45 hours is j