You have recently joined a movie club. Suppose that the number of times you expect to watch a movie in a month is represented by a normally distributed random variable with a mean of 12 and a standard deviation of 5 1. Over the course of the next 6 months, the probability that on average you watch more than 15 movies a month is 2. Over the course of the next year, the probability is 70% that you average less than how many movies per month is