(1 pt) What is the probability that a randomly selected US adult slept more than you did last night? (1 pt) Doctors recommend 8 hours of sleep per day for adults to have the health benefits of sleep. What percent of US adults sleep less than this recommended amount? (1 pt) A colleague at work says that she usually sleeps less than 4 hours each day. Is her sleep amount unusual? Justify your answer by calculating its probability. (1 pt) 10% of US adults sleep more than how many hours? (1 pt) A simple random sample of 25 U.S. adults is taken. What is the mean and standard deviation of the sampling distribution of sample means? Report your answers using the proper symbols