The heights of a certain type of seedlings are normally distributed with mean 15.8 cm and standard deviation 1.5cm. A seedling is selected at random from a large batch of these seedlings. What is the probability its height is less than 14 cm? O a. 0.1151 O b. 0.8849 O c. 0.1200 O d. 0.9332 If 0.5 and 4.2 are added to the data set, which of the following would be affected? O a. The range O b. The mode O c. The median O d. The mean