1.    We will investigate the Short Term Memory scores for the subjects in the data set (variable STM); call this variable X. Assume the population values of STM are Normally distributed with mean 30 and standard deviation 20.

a)  (2 points) Find the probability an individual, selected at random, has a STM less than 35. Show your work. The correct probability statement is required to get full credit. Write final answer to 4 decimal places.