A survey found that the mean amount of time a driver in Boston spends to find a parking space is 53 hours per year. Assume the variable is normally distributed and the standard deviation is 6 hours: a) If an individual driver from Boston is randomly selected, find the probability they will spend between 52 and 55 hours per year trying to find a parking space. 0.1967 b) If a sample of 30 drivers is randomly selected, find the probability that the mean of the sample will be between 52 and 55 hours. 0.7854 c) Why is the answer to part a) smaller than the answer to part b)? individual vs. sample