EA How much do wild mountain lions weigh? Adult wild mountain lions (18 months or older) captured and released for the first time in the San Andres Mountains gave the following weights (pounds): 72 100 128 126 61 67 LA USE SALT Assume that the population of x values has an approximately normal distribution. (a) Find the sample mean weight x and sample standard deviation s. (Round your answers to four decimal places.) X = Ib S = Ib (b) Find a 78% confidence interval for the population average weight u of all adult mountain lions in the specified region. (Round your answers to one decimal place.) lower limit Ib upper limit Ib