When a distribution is negatively skewed, a) the tails are fatter than in a normal distribution. b) standard deviation underestimates risk. c) the skew measure is positive. d) standard deviation correctly estimates risk. e) standard deviation overestimates risk. When a distribution is negatively skewed, a) the tails are fatter than in a normal distribution. b) standard deviation underestimates risk. c) the skew measure is positive. d) standard deviation correctly estimates risk. e) standard deviation overestimates risk