2. Expected value and standard deviation of the sample mean (infinite population) A local transit agency.r wants to estimate the average time its bus drivers take to complete their downtown routes during rush hour. In order to estimate the average route time during rush hour, the agent's:r plans to take a random sample of F2 route times from routes driven during rush hour in the past 5 years. Suppose that the population from which the route times will be selected has a mean and standard deviation of p = 125 minutes and o = 15r respectively. What is the expected value of the sample mean? Eat} = |:| What is the standard deviation of the sampling distribution of the sample mean? >3 || 4 || 4