A.) It was estimated that batting averages in major league baseball in the 1940s were distributed with a mean of 0.260 and a standard deviation of 0.07. What percentage of the batters would have an average greater than 0.400?
B.) Recent estimates have the batting averages distributed with the same mean but less variability. THe new standard deviation is estimated to be 0.05. What percentage of the players would bat over 0.400 today?