1) 5 points. In a normal distribution with mean @ and standard deviation , in which of the following intervals do approximately 68% of the data lie? a) x - 2s and x + 2s b) x - s and x + s c) u - o and u + 0 d) u - 20 and u + 20 e) u - .68/2 and u + .68/2 2) 8 points. This simple question does not require any statistical calculations, only statistical knowledge. The showerhead heights at a men's athletic locker room were designed to be 72 inches which is well above the mean height of 69.5". The heights of the athletes are normally distributed. From the choices listed below, which is more likely to be true: a, b, cord? a) The mean height for a randomly selected sample of 10 players is more than 72 inches. bj The height of one randomly selected player is more than 72 inches. () Both a and b are equally likely. d) None of the above Why? (Justify your answer with a short answer.)