The distribution of shoe sizes for males in the U.S. is roughly normally distributed with a mean of 10 and standard deviation of 1.4. A random sample of 16 males is taken. a. In words, define the random variables X and X-bar. b. State the distribution of X and X-bar, if possible. c. Calculate the interval for the middle 20% of male shoe sizes. d. Calculate male shoe size such that 80% of sample averages are above