Calculate the standard error. May normality be assumed? (Round your answers to 4 decimal places.) Standard Error (a) n=26, 0.50 (b) n 47, = 0.23 (c) n = 95, = 0.12 (d) n = 469, = 0.002 Normality The combined (city and highway) fuel economy of a 2022 Acura RDX Premium Sport Crossover 2.0L VTEC Turbo using premium fuel is a normally distributed random variable with a mean of = 20.50 mpg and a standard deviation of = 3.00 mpg. (a) What is the standard error of X, the mean from a random sample of 36 fill-ups by one driver? (Round your answer to 4 decimal places.) Standard error of X (b) Within what interval would you expect the sample mean to fall, with 99 percent probability? (Round your answers to 4 decimal places.) The interval is from to